Home ReviewsRefund
Home/Buick/Encore/Buick Encore I (2012-2016)/Repair manual/Testing & Diagnostics/Engine Controls and Fuel - 1.4l (Luj Luv) - Repair Instruct…
Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Controls and Fuel - 1.4l (Luj Luv) - Repair Instructions Buick Encore I

Testing & Diagnostics 37 illustrations ~5845 words

Calibration Criteria

Note. Do not apply the brake pedal during the brake pedal position sensor calibration procedure. Any movement of the brake pedal during this procedure will cause the calibration procedure to fail. If this occurs, the brake pedal position sensor calibration must be repeated.

Brake pedal position sensor calibration must be performed after the brake pedal position sensor, body control module (BCM), or engine control module (ECM) have been serviced. The calibration procedure will set the brake pedal position sensor home value. This value is used by the BCM and ECM to determine the action of the driver applying the brake system and to provide this information to the vehicle subsystems via serial data.

Calibration Procedure

  1. Apply the parking brake.
  2. Ignition ON, engine OFF, place the transmission in the PARK position for automatic transmission or NEUTRAL position for manual transmission.
  3. Install a scan tool.
  4. Clear all DTCs before proceeding.
  5. Navigate to the Configuration/Reset Functions menu of the BCM.
  6. Select the Brake Pedal Position Sensor Learn procedure and follow the directions displayed on the screen.
  7. Navigate to the Configuration/Reset Functions menu of the ECM.
  8. Select the Learn Functions menu.
  9. Select the Brake Pedal Position Sensor Learn procedure and follow the directions displayed on the screen.

Scheme 1

Scheme 1: Engine Control Module Replacement
Scheme 1: Engine Control Module Replacement
CalloutComponent Name
Preliminary Procedure Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
1Engine Control Module Fasteners (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten 9 (80 lb in)
2Engine Control Module CAUTION: Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed. Procedure Disconnect the electrical connector. If replacing, program the ECM. Refer to Control Module References . NOTE: Before removing the engine control module (ECM), use the scan tool to capture the ECM data. This captured data will then need to be restored into the NEW ECM. Refer to Control Module References .
CAUTION
Refer to Fastener Caution .
CAUTION
Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed.
NOTE
Before removing the engine control module (ECM), use the scan tool to capture the ECM data. This captured data will then need to be restored into the NEW ECM. Refer to Control Module References .

Engine Control Module Replacement

Crankshaft Position System Variation Learn

Note. The crankshaft position sensor system variation learn procedure is required when the following service procedures have been performed, regardless of whether DTC P0315 is set: Engine replacement Engine control module (ECM) replacement Crankshaft damper replacement Crankshaft replacement Crankshaft Position Sensor Replacement Any engine repairs which disturb the crankshaft to crankshaft position sensor relationship.

Note. The ECM monitors certain component signals to determine if all the conditions are met to continue with the Crankshaft Position Variation Learn procedure.

  1. Ignition ON, observe the DTC information with a scan tool. Verify no other DTCs are set, except DTCs P0300-P0304, or P0315. If DTCs are set, except DTCs P0300-P0304, or P0315, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for further diagnosis.
  2. Select the Crankshaft Position Variation Learn Procedure with a scan tool and follow the on screen instructions
  3. Verify DTC P0315 does not set. If DTC P0315 set, or another DTC is present refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for the applicable DTC that set. If the DTC does not set
  4. All OK.

Scheme 2

Scheme 2: Engine Coolant Temperature Sensor Replacement (Water Outlet)
Scheme 2: Engine Coolant Temperature Sensor Replacement (Water Outlet)
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling . Remove the charge air cooler outlet air hose. Refer to Charge Air Cooler Outlet Air Hose Replacement .
1Engine Coolant Temperature Sensor Retainer
2Engine Coolant Temperature Sensor Procedure Disconnect the engine coolant temperature sensor electrical connector.

Engine Coolant Temperature Sensor Replacement (Water Outlet)

Scheme 3

Scheme 3: Engine Coolant Temperature Sensor Replacement (Radiator)
Scheme 3: Engine Coolant Temperature Sensor Replacement (Radiator)
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Engine Coolant Temperature Sensor Retainer
2Engine Coolant Temperature Sensor Procedure Disconnect the engine coolant temperature sensor electrical connector.

Engine Coolant Temperature Sensor Replacement (Radiator)

Scheme 4

Scheme 4: Mass Airflow Sensor Replacement
Scheme 4: Mass Airflow Sensor Replacement
CalloutComponent Name
1Mass Airflow Sensor Fasteners (Qty 2) CAUTION: Refer to Fastener Caution . Tighten 5 (44 lb in)
2Mass Airflow Sensor Procedure Disconnect the mass airflow sensor electrical connector.
CAUTION
Refer to Fastener Caution .

Mass Airflow Sensor Replacement

Scheme 5

Scheme 5: Intake Air Pressure and Temperature Sensor Replacement
Scheme 5: Intake Air Pressure and Temperature Sensor Replacement
CalloutComponent Name
1Intake Air Temperature and Pressure Sensor Fastener CAUTION: Refer to Fastener Caution .
2Intake Air Temperature and Pressure Sensor Procedure Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Intake Air Pressure and Temperature Sensor Replacement

Scheme 6

Scheme 6: Manifold Absolute Pressure Sensor Replacement
Scheme 6: Manifold Absolute Pressure Sensor Replacement
CalloutComponent Name
1Manifold Absolute Pressure Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Manifold Absolute Pressure Sensor Procedure Disconnect the manifold absolute pressure sensor electrical connector.
CAUTION
Refer to Fastener Caution .

Manifold Absolute Pressure Sensor Replacement

Scheme 7

Scheme 7: Turbocharger Wastegate Regulator Solenoid Valve Replacement
Scheme 7: Turbocharger Wastegate Regulator Solenoid Valve Replacement
CalloutComponent Name
Preliminary Procedure Disconnect the turbocharger wastegate regulator solenoid valve electrical connector.
1Turbocharger Wastegate Regulator Solenoid Valve Vacuum Hose (Qty: 3)
2Turbocharger Wastegate Regulator Solenoid Valve Bolt
3Turbocharger Wastegate Regulator Solenoid Valve Bolt Washer
4Turbocharger Wastegate Regulator Solenoid Valve

Turbocharger Wastegate Regulator Solenoid Valve Replacement

Scheme 8

Scheme 8: Heated Oxygen Sensor Replacement - Sensor 1
Scheme 8: Heated Oxygen Sensor Replacement - Sensor 1
CalloutComponent Name
1Heated Oxygen Sensor CAUTION: The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal of the pigtail connector could affect proper operation of the oxygen sensor. CAUTION: The use of excessive force may damage the threads in the exhaust manifold/pipe. CAUTION: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution . CAUTION: Refer to Component Fastener Tightening Caution . Procedure Disconnect the heated oxygen sensor harness connector from the water outlet housing. Disconnect the heated oxygen sensor harness connector from the engine wiring harness.. NOTE: The in-line connector and louvered end must be kept clear of grease, dirt or other contaminants. Avoid using cleaning solvents of any type. DO NOT drop or roughly handle the heated oxygen sensor (HO2S). The HO2S may be difficult to remove when the engine temperature is less than 48°C (120°F). A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied before installation. Tighten 42 (31 lb ft)
CAUTION
The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal of the pigtail connector could affect proper operation of the oxygen sensor.
CAUTION
The use of excessive force may damage the threads in the exhaust manifold/pipe.
NOTE
The in-line connector and louvered end must be kept clear of grease, dirt or other contaminants. Avoid using cleaning solvents of any type. DO NOT drop or roughly handle the heated oxygen sensor (HO2S). The HO2S may be difficult to remove when the engine temperature is less than 48°C (120°F). A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied before installation.

Heated Oxygen Sensor Replacement - Sensor 1

Scheme 9

Scheme 9: Heated Oxygen Sensor Replacement - Sensor 2
Scheme 9: Heated Oxygen Sensor Replacement - Sensor 2
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . If equipped, remove the front compartment front center insulator. Refer to Front Compartment Front Center Insulator Replacement .
1Heated Oxygen Sensor CAUTION: The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal of the pigtail connector could affect proper operation of the oxygen sensor. CAUTION: The use of excessive force may damage the threads in the exhaust manifold/pipe. CAUTION: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution . CAUTION: Refer to Component Fastener Tightening Caution . Procedure Disconnect the heated oxygen sensor harness connector. NOTE: The in-line connector and louvered end must be kept clear of grease, dirt or other contaminants. Avoid using cleaning solvents of any type. DO NOT drop or roughly handle the heated oxygen sensor (HO2S). The HO2S may be difficult to remove when the engine temperature is less than 48°C (120°F). A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied before installation. Tighten 42 (31 lb ft)
CAUTION
The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal of the pigtail connector could affect proper operation of the oxygen sensor.
CAUTION
The use of excessive force may damage the threads in the exhaust manifold/pipe.
NOTE
The in-line connector and louvered end must be kept clear of grease, dirt or other contaminants. Avoid using cleaning solvents of any type. DO NOT drop or roughly handle the heated oxygen sensor (HO2S). The HO2S may be difficult to remove when the engine temperature is less than 48°C (120°F). A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound applied to the threads. If a sensor is removed and is to be reinstalled, the threads must have an anti-seize compound applied before installation.

Heated Oxygen Sensor Replacement - Sensor 2

Scheme 10

Scheme 10: Engine Oil Pressure Indicator Switch Replacement
Scheme 10: Engine Oil Pressure Indicator Switch Replacement
CalloutComponent Name
1Engine Oil Pressure Indicator Switch CAUTION: Refer to Component Fastener Tightening Caution . Procedure Place collecting basin underneath. Disconnect the electrical connector. Check engine oil level after replacement. Tighten 20 N.m (15 lb ft)
2Engine Oil Pressure Indicator Switch Seal

Engine Oil Pressure Indicator Switch Replacement

Scheme 11

Scheme 11: Accelerator Pedal Position Sensor Replacement
Scheme 11: Accelerator Pedal Position Sensor Replacement
CalloutComponent Name
1Accelerator Pedal Position Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 10 N.m (89 lb in)
2Accelerator Pedal Position Sensor Procedure Disconnect electrical connector.
CAUTION
Refer to Fastener Caution .

Accelerator Pedal Position Sensor Replacement

Removal Procedure

  1. Disconnect the throttle body wiring harness connector.
  2. Remove the charge air cooler outlet air hose from the throttle body. Refer to «Charge Air Cooler Outlet Air Hose Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  3. Remove the 4 throttle body fasteners (3).
  4. Remove the throttle body (2) along with the throttle body seal ring (1).

Installation Procedure

  1. Install the throttle fasteners (3) along with a NEW throttle body seal ring (1).
  2. Install the 4 throttle body fastener (3) and tighten to 8 (71 lb in).
  3. Install the charge air cooler outlet air hose to the throttle body. Refer to «Charge Air Cooler Outlet Air Hose Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  4. Connect the throttle body wiring harness connector.
  5. Perform the throttle/idle learn. Refer to «Q38 Throttle Body: Throttle/Idle Learn»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .

Throttle Body Inspection and Cleaning

Note. Over extended time and mileage, deposits may accumulate on the back of the throttle valve plate. The source of the deposit is exhaust gas. Typically these deposits pose no problem. Occasionally the deposit may accumulate to a point where perceived pedal effort or throttle valve movement is effected. This procedure should not be performed on vehicles with mileage under 80,450 km (50,000 mi).

  1. Remove the charge air cooler outlet air hose. Refer to «Charge Air Cooler Outlet Air Hose Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  2. Inspect the throttle body bore and the throttle valve plate for deposits. You will need to open the throttle valve in order to inspect all surfaces.
  3. Clean the throttle body bore and the throttle valve plate using a clean shop towel with an appropriate cleaner.
  4. Install the charge air cooler outlet air hose. Refer to «Charge Air Cooler Outlet Air Hose Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .

Fuel Pressure Relief

WARNINGRemove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.
  1. Disconnect the battery. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/encore/i-2012-2016/remont/body-electrical/#battery-charging-system-and-starting-system)
  2. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
  3. Remove the engine cover, if required.
  4. Remove the fuel rail service port cap.
  5. Wrap a shop towel around the fuel rail service port and using a small flat bladed tool, depress (open) the fuel rail test port valve.
  6. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
  7. Install the fuel rail service port cap.
  8. Install the engine cover, if required.
  9. Tighten the fuel fill cap.

Fuel Tank Draining

Special Tool

CH 45004 Fuel Tank Drain Hose

WARNINGNever drain or store fuel in an open container. Always use an approved fuel storage container in order to reduce the chance of fire or explosion.
WARNINGPlace a dry chemical (Class B) fire extinguisher nearby before performing any on-vehicle service procedures. Failure to follow these precautions may result in personal injury.
  1. Remove the fuel fill cap.
  2. Remove the fuel tank sender. Refer to «Fuel Sender Assembly Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-sender-assembly-replacement-awd) .
  3. With the fuel tank sender (1) and seal (2) removed, insert the CH 45004 hose into the fuel tank until the bottom is reached.
  4. Using an appropriate pump or syphon, drain as much fuel from the tank as possible.
WARNINGGasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.
  1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-pressure-relief) .
  2. Drain the fuel tank. Refer to «Fuel Tank Draining»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-draining) .
  3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  4. Remove the exhaust. Refer to «Exhaust Muffler Replacement (LUV)»(/buick/encore/i-2012-2016/remont/exhaust/#engine-exhaust-system) .
  5. Remove the propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/buick/encore/i-2012-2016/remont/driveshaft-universal-joints/#propeller-shaft) .
  6. Remove the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/buick/encore/i-2012-2016/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  7. Disconnect the fuel tank fuel pump module wiring harness (1) and unclip the fuel tank module wiring harness from the chassis.
  8. Disconnect the fuel tank filler pipe. Refer to «Fuel Tank Filler Pipe Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  9. Disconnect the fuel feed pipe. «Fuel Feed Pipe Replacement (At Tank AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions)
  10. Disconnect the EVAP system hoses. Refer to «Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) «Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  11. Position a suitable hydraulic lift below the fuel tank.
  12. Remove both fuel tank strap fasteners (1).
  13. Remove both fuel tank straps from the fuel tank (2).
  14. With the aid of an assistant, lower the hydraulic lift to remove the fuel tank from the vehicle.
  15. Remove the fuel tank from the hydraulic lift.
  16. Remove the fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-fuel-pump-module-replacement) .
  17. Remove the fuel sender assembly. Refer to «Fuel Sender Assembly Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-sender-assembly-replacement-awd) .
  18. Remove the evaporative emission canister. Refer to «Evaporative Emission Canister Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  1. Install the fuel sender assembly. Refer to «Fuel Sender Assembly Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-sender-assembly-replacement-awd) .
  2. Transfer the fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-fuel-pump-module-replacement) .
  3. Transfer the evaporative emission canister. Refer to «Evaporative Emission Canister Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  4. Install the fuel tank to the hydraulic lift.
  5. With the aid of an assistant, position the fuel tank to the vehicle.
  6. Install both fuel tank straps to the fuel tank (2) and tighten the fasteners to 22 (16 lb ft).
  7. Remove the hydraulic lift from the fuel tank.
  8. Connect the EVAP system hoses. Refer to «Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) «Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  9. Connect the fuel feed pipe. Refer to «Fuel Feed Pipe Replacement (At Tank AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  10. Connect the fuel tank filler pipe. Refer to «Fuel Tank Filler Pipe Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  11. Connect the fuel tank fuel pump module wiring harness (1) and clip the fuel tank module wiring harness to the chassis.
  12. Install the propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/buick/encore/i-2012-2016/remont/driveshaft-universal-joints/#propeller-shaft) .
  13. Install the exhaust. Refer to «Exhaust Muffler Replacement (LUV)»(/buick/encore/i-2012-2016/remont/exhaust/#engine-exhaust-system) ,.
  14. Install the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/buick/encore/i-2012-2016/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  15. Lower the vehicle.
  1. Remove the fuel cap.
  2. Remove the right rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/encore/i-2012-2016/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  3. Remove the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/buick/encore/i-2012-2016/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  4. Remove the fuel tank filler pipe fastener (1).
  5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  6. Remove the fuel tank filler pipe clamp (2).
  7. Disconnect the fuel tank filler pipe quick connect fitting (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  8. Remove the fuel tank filler pipe fastener (3).
  9. Remove the fuel tank filler pipe (4) from the vehicle.
  1. Install the fuel tank filler pipe (4) to the vehicle.
  2. Install the fuel tank filler pipe fastener (3) and tighten to 9 (80 lb in).
  3. Connect the fuel tank filler pipe quick connect fitting (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  4. Install the fuel tank filler pipe clamp (2).
  5. Lower the vehicle.
  6. Install the fuel tank filler pipe fastener (1) and tighten to 9 (80 lb in).
  7. Install the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/buick/encore/i-2012-2016/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  8. Install the right rear tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/encore/i-2012-2016/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  9. Install the fuel cap.
  1. Relieve the fuel pressure. Refer to «Fuel Pressure Relief»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-pressure-relief) .
  2. Remove the fuel pressure sensor - fuel feed pipe. Refer to «Fuel Pressure Sensor Replacement - Fuel Feed Pipe»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  3. Remove the fuel feed pipe (1) from the fuel rail. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  4. Remove the fuel feed pipe (1) from the retainers (2).
  5. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  6. Remove the fuel feed pipe (1) from the fuel feed pipe at the tank. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  7. Remove the underbody sill shield.
  8. Remove the fuel feed pipe (1) from the retainers (2).
  9. Remove the fuel feed pipe (1) from the vehicle.
  1. Install the fuel feed pipe (1) to the vehicle.
  2. Install the fuel feed pipe (1) to the retainers (2).
  3. Install the underbody sill shield.
  4. Install the fuel feed pipe (1) to the fuel feed pipe at the tank. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  5. Lower the vehicle.
  6. Install the fuel feed pipe (1) to the retainers (2).
  7. Install the fuel feed pipe (1) to the fuel rail. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  8. Install the fuel pressure sensor - fuel feed pipe. Refer to «Fuel Pressure Sensor Replacement - Fuel Feed Pipe»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .

Scheme 12

Scheme 12: Fuel Feed Pipe Replacement (At Tank AWD)
Scheme 12: Fuel Feed Pipe Replacement (At Tank AWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Relieve the fuel pressure. Refer to Fuel Pressure Relief . Remove the fuel tank. Refer to Fuel Tank Replacement .
1Fuel Feed Pipe Procedure Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Fuel Feed Pipe Replacement (At Tank AWD)

Scheme 13

Scheme 13: Fuel Feed Pipe Replacement (At Tank FWD)
Scheme 13: Fuel Feed Pipe Replacement (At Tank FWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Relieve the fuel pressure. Refer to Fuel Pressure Relief . Remove the fuel tank. Refer to Fuel Tank Replacement .
1Fuel Feed Pipe Procedure Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Fuel Feed Pipe Replacement (At Tank FWD)

Fuel Tank Fuel Pump Module Replacement (AWD)

Special Tools

CH-45722 Fuel Pump Locking Ring Wrench

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

WARNINGAlways wear safety goggles when working with fuel in order to protect the eyes from fuel splash.
WARNINGDo not allow smoking or the use of open flames in the area where work on the fuel or EVAP system is taking place. Anytime work is being done on the fuel system, disconnect the negative battery cable, except for those tests where battery voltage is required.
  1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  2. Remove the fuel sender assembly. Refer to «Fuel Sender Assembly Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-sender-assembly-replacement-awd) .
  3. Disconnect the electrical connector.
  4. Remove the fuel feed pipe. Refer to «Fuel Feed Pipe Replacement (At Tank AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  5. Remove the EVAP system hoses. Refer to «Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) , «Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  6. Install the CH-45722 Fuel Pump Locking Ring Wrench to the fuel pump module lock ring (1).
  7. Using the CH-45722 Fuel Pump Locking Ring Wrench and a long breaker-bar, rotate the fuel pump module lock ring (1) in a counterclockwise direction in order to unlock the lock ring from the fuel tank (2).
  8. Raise the fuel pump module (2) enough to gain access to the fuel tank vent pipe (1) and disconnect the pipe from the fuel pump module. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  9. Remove the fuel tank fuel pump module (2).
  10. Remove and discard the fuel tank fuel pump module O-ring gasket (1).
  1. Install a NEW fuel tank fuel pump module O-ring gasket (1) to the fuel tank fuel pump module (2).
  2. Lower the fuel pump module (2) into the fuel tank while connecting the fuel tank vent pipe (1) to the fuel pump module. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  3. Install the fuel tank fuel pump module lock ring (1) to the fuel tank (2).
  4. Using the CH-45722 Fuel Pump Locking Ring Wrench and a long breaker-bar, rotate the fuel pump module lock ring (1) in a clockwise direction in order to lock the lock ring.
  5. Install the EVAP system hoses. Refer to «Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) , «Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  6. Install the fuel feed pipe. Refer to «Fuel Feed Pipe Replacement (At Tank AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  7. Connect the electrical connector.
  8. Install the fuel sender assembly. Refer to «Fuel Sender Assembly Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-sender-assembly-replacement-awd) .
  9. Install the fuel tank. Refer to «Fuel Tank Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .

Fuel Tank Fuel Pump Module Replacement (FWD)

Special Tools

CH-45722 Fuel Pump Locking Ring Wrench

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

WARNINGAlways wear safety goggles when working with fuel in order to protect the eyes from fuel splash.
WARNINGDo not allow smoking or the use of open flames in the area where work on the fuel or EVAP system is taking place. Anytime work is being done on the fuel system, disconnect the negative battery cable, except for those tests where battery voltage is required.
  1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  2. Disconnect the electrical connector.
  3. Disconnect the fuel feed pipe. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  4. Disconnect the evaporative emission hoses. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  5. Install the CH-45722 Tool-Fuel Sender Lock Ring to the fuel pump module lock ring (1).
  6. Using the CH-45722 Tool-Fuel Sender Lock Ring and a long breaker-bar, rotate the fuel pump module lock ring (1) in a counterclockwise direction in order to unlock the lock ring from the fuel tank (2).
  7. Raise the fuel pump module (2) enough to gain access to the fuel tank vent pipe (1) and disconnect the pipe from the fuel pump module. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  8. Remove the fuel tank fuel pump module (2).
  9. Remove and discard the fuel tank fuel pump module O-ring gasket (1).
  1. Install a NEW fuel tank fuel pump module O-ring gasket (1).
  2. Install the fuel tank fuel pump module (2).
  3. Lower the fuel pump module (2) into the fuel tank while connecting the fuel tank vent pipe (1) to the fuel pump module. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions)
  4. Install the fuel tank fuel pump module lock ring (1) to the fuel tank (2).
  5. Using the CH-45722 Tool-Fuel Sender Lock Ring and a long breaker-bar, rotate the fuel pump module lock ring (1) in a clockwise direction in order to lock the lock ring.
  6. Connect the evaporative emission hoses. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  7. Connect the fuel feed pipe. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  8. Connect the electrical connector.
  9. Install the fuel tank. Refer to «Fuel Tank Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .

Scheme 14

Scheme 14: Fuel Tank Pressure Sensor Replacement
Scheme 14: Fuel Tank Pressure Sensor Replacement
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement .
1Fuel Tank Pressure Sensor Procedure Disconnect the electrical connector.
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Fuel Tank Pressure Sensor Replacement

Fuel Sender Assembly Replacement (AWD)

Special Tools

EN-48482 Fuel Sender Lock Ring Wrench

WARNINGAlways wear safety goggles when working with fuel in order to protect the eyes from fuel splash.
WARNINGDo not allow smoking or the use of open flames in the area where work on the fuel or EVAP system is taking place. Anytime work is being done on the fuel system, disconnect the negative battery cable, except for those tests where battery voltage is required.
  1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  2. Disconnect the fuel tank wiring harness from the fuel sender.
  3. Install the EN-48482 Fuel Sender Lock Ring Wrench to the fuel sender lock ring (1).
  4. Using the EN-48482 Fuel Sender Lock Ring Wrench and a long breaker-bar, rotate the fuel sender lock ring (1) in a counterclockwise direction in order to unlock the lock ring from the fuel tank (2).
  5. Raise the fuel sender (1) enough to gain access to the fuel tank fuel pump module fuel pickup (2) and disconnect the fuel sender from the fuel pickup.
  6. Remove the fuel sender (1).
  7. Remove and discard the fuel sender O-ring gasket (2).
  1. Install a NEW fuel sender O-ring gasket (2) to the fuel sender (1).
  2. Lower the fuel sender (1) into the fuel tank while connecting the fuel tank fuel pump module fuel pickup (2) to the fuel sender (1).
  3. Install the fuel sender lock ring (1) to the fuel tank (2).
  4. Install the EN-48482 Fuel Sender Lock Ring Wrench to the fuel sender lock ring (1).
  5. Using the EN-48482 Fuel Sender Lock Ring Wrench and a long breaker-bar, rotate the fuel sender lock ring (1) in a clockwise direction in order to lock the lock ring.
  6. Connect the fuel tank sender wiring harness electrical connector.
  7. Install the fuel tank. Refer to «Fuel Tank Replacement»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .

Scheme 15

Scheme 15: Chassis Control Module Replacement
Scheme 15: Chassis Control Module Replacement
CalloutComponent Name
Preliminary Procedures Remove the quarter lower rear trim panel. Refer to Quarter Lower Rear Trim Panel Replacement .
1Fuel Pump Flow Control Module Bolt CAUTION: Refer to Fastener Caution Tighten 9 N.m (80 lb in)
2Fuel Pump Flow Control Module Procedure Disconnect the electrical connector. Program the fuel pump flow control module. Refer to Control Module References .
CAUTION
Refer to Fastener Caution

Chassis Control Module Replacement

Fuel Pump Flow Control Module Replacement

CalloutComponent Name
Preliminary Procedures Remove the quarter lower rear trim panel. Refer to Quarter Lower Rear Trim Panel Replacement .
1Fuel Pump Flow Control Module Bolt CAUTION: Refer to Fastener Caution Tighten 9 N.m (80 lb in)
2Fuel Pump Flow Control Module Procedure Disconnect the electrical connector. Program the fuel pump flow control module. Refer to Control Module References .
CAUTION
Refer to Fastener Caution

Fuel Pump Flow Control Module Replacement

Scheme 16

Scheme 16: Fuel Level Sensor Replacement
Scheme 16: Fuel Level Sensor Replacement
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank fuel pump module. Refer to Fuel Tank Fuel Pump Module Replacement (AWD) , Fuel Tank Fuel Pump Module Replacement (FWD) . Disconnect the electrical connector.
1Fuel Level Sensor Procedure Release tabs and slide fuel level sensor up to remove.
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Fuel Level Sensor Replacement

Scheme 17

Scheme 17: Fuel Pressure Sensor Replacement - Fuel Feed Pipe
Scheme 17: Fuel Pressure Sensor Replacement - Fuel Feed Pipe
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Relive the fuel pressure. Refer to Fuel Pressure Relief .
1Fuel Pressure Sensor Procedure Disconnect the electrical connector.
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Fuel Pressure Sensor Replacement - Fuel Feed Pipe

Note. If servicing a fuel system, insure the fuel pressure has been relieved.

Scheme 18

Scheme 18
Scheme 18

Note. There are several types of plastic collar fuel and evaporative emission quick connect fittings used on this vehicle. Bartholomew (1) Q Release (2) Squeeze to Release (3) Sliding Retainer (4) Global Connect (5) TI Loc (6) Safe Lock (7) Plastic Connector (8) The following instructions apply to all of these types of plastic collar quick connect fittings except where indicated.

  1. Using compressed air, blow any dirt out of the quick-connect fitting.
  2. This step applies to Bartholomew style connectors ONLY. Squeeze the plastic quick-connect fitting release tabs.
  3. This step applies to Q Release style connectors ONLY. Release the fitting by Pushing the tab toward the other side of the slot in the fitting.
  4. This step applies to Squeeze to Release style connectors ONLY. Squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
  5. This step applies to Squeeze to Release style connectors ONLY. Push in the male side slightly in order to slide the retainer away from the retainers, squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
  6. This step applies to Sliding Retainer style connectors ONLY. Release the fitting by pressing on one side of the release tab causing it to push in slightly. If the tab doesn't move try pressing the tab in from the opposite side. The tab will only move in one direction.
  7. This step applies to the Global Connector style only. Push the connector toward the tube in order to release the pressure. Press and hold down the release mechanism, and pull the connector straight out.
  8. This step applies to the TI Loc style only. Push the connector toward the tube in order to release the pressure. Release the redundant latch (1) with two fingers or a flat bladed tool. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
  9. This step applies to the Safe Lock style only. Push the connector toward the tube in order to release the pressure. Release the second latch (1) with two fingers. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
  10. This step applies to the Plastic Connector style 8, push the connector toward the tube in order to release the pressure. Press the latch (1) inward in order to release the pipe, while pulling the connector (2) straight out.
  11. Using a clean shop towel, wipe off the male pipe end.
  12. Inspect both ends of the fitting for dirt and burrs.
  13. Clean or replace components as necessary.
  1. Apply a few drops of clean engine oil to the male pipe end.
  2. Push both sides of the quick-connect fitting together in order to cause the retaining feature to snap into place.
  3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
  4. Insert the tube in the connector until the retainer snaps in place.
  5. Push down on the redundant latch (1) until it is fully engaged and snapped into position.
  6. Insert the tube in the connector until the retainer snaps in place.
  7. Push down on the second latch (1) in order to secure the connection.
  8. For the plastic connector type 8, depress the latch (1) while inserting the connector (3) on to the pipe (2) .
  9. Move the latch (1) upward in order to secure the connection.
  10. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

Fuel System Cleaning

  1. Drain the fuel tank. Refer to «Fuel Tank Draining»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-draining) .
  2. Remove the fuel pump module assembly. Refer to «Fuel Tank Fuel Pump Module Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-fuel-pump-module-replacement) , «Fuel Tank Fuel Pump Module Replacement (FWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-fuel-pump-module-replacement) .
  3. Inspect the fuel pump module strainer. Replace the pump module assembly if the fuel strainer is contaminated.
  4. Flush the fuel tank with hot water.
  5. Pour the water out of the fuel sender assembly opening in the fuel tank. Rock the fuel tank in order to be sure that the removal of the water from the fuel tank is complete.
  6. Allow the tank to dry completely before reassembly.
  7. Disconnect the fuel feed pipe at the engine fuel rail. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  8. Clean the fuel pipes by applying air pressure in the opposite direction of the fuel flow.
  9. Connect the fuel feed pipe to the engine fuel rail. Refer to «Plastic Collar Quick Connect Fitting Service»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  10. Install the fuel pump module assembly. Refer to «Fuel Tank Fuel Pump Module Replacement (AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-fuel-pump-module-replacement) , «Fuel Tank Fuel Pump Module Replacement (FWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions__fuel-tank-fuel-pump-module-replacement) .
  1. Disconnect battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/encore/i-2012-2016/remont/body-electrical/#battery-charging-system-and-starting-system) .
  2. Remove engine cover. Refer to «Engine Cover Replacement»(ref-614552-S23407649322014050700000) .
  3. Remove the fuel feed pipe from fuel injection fuel rail. Refer to «Fuel Feed Pipe Replacement (Engine to Tank)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) , «Fuel Feed Pipe Replacement (At Tank AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) , «Fuel Feed Pipe Replacement (At Tank FWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  4. Remove the positive crankcase ventilation pipe from the intake manifold. Refer to «Positive Crankcase Ventilation Pipe Removal»(ref-614552-S15010151192014050700000) .
  5. Disconnect the 4 fuel injector wiring harness plugs (2).
  6. Unclip the ECM wiring harness from retainer clips (1) and the camshaft cover.
  7. Remove the ground cable nut (2) and the ground cable.
  8. Remove the 2 fuel injection fuel rail bolts (1).
  9. Remove the fuel injection fuel rail assembly (1) and the 4 fuel injector seal rings (2).
  1. Install the fuel injection fuel rail assembly (1) to the intake manifold. Use NEW fuel injector seal rings (2).
  2. Install the 2 fuel injection fuel rail bolts (1) and tighten to 7 N.m (62 lb in).
  3. Install the ground cable and the ground cable nut (2) and tighten.
  4. Connect the 4 fuel injector wiring harness plugs (2).
  5. Clip the ECM wiring harness to the retainer clip (1) and the camshaft cover.
  6. Remove the positive crankcase ventilation pipe from the intake manifold. Refer to «Positive Crankcase Ventilation Pipe Removal»(ref-614552-S15010151192014050700000) .
  7. Install the fuel feed pipe to the fuel injection fuel rail. Refer to «Fuel Feed Pipe Replacement (Engine to Tank)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) , «Fuel Feed Pipe Replacement (At Tank AWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) , «Fuel Feed Pipe Replacement (At Tank FWD)»(/buick/encore/i-2012-2016/remont/testing-diagnostics/#engine-controls-and-fuel-14l-luj-luv-repair-instructions) .
  8. Install the engine sight shield. Refer to «Engine Cover Replacement»(ref-614552-S23407649322014050700000) .
  9. Connect battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/encore/i-2012-2016/remont/body-electrical/#battery-charging-system-and-starting-system) .

Scheme 19

Scheme 19: Fuel Injector Replacement
Scheme 19: Fuel Injector Replacement
CalloutComponent Name
Preliminary Procedure Disconnect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection . Remove the fuel injection fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .
1Fuel Rail
2Fuel Injector
3Fuel Injector Seal Ring
4Fuel Injector Retainer Clamp

Fuel Injector Replacement

Scheme 20

Scheme 20: Evaporative Emission Canister Vent Solenoid Valve Replacement
Scheme 20: Evaporative Emission Canister Vent Solenoid Valve Replacement
CalloutComponent Name
Preliminary Procedure Remove the evaporative emission canister. Refer to Evaporative Emission Canister Replacement (AWD) , Evaporative Emission Canister Replacement (FWD) .
1Evaporative Emission Canister Vent Solenoid Valve Procedure Disconnect the electrical connector. Rotate the solenoid counterclockwise to remove.

Evaporative Emission Canister Vent Solenoid Valve Replacement

Scheme 21

Scheme 21: Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)
Scheme 21: Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Pipe Procedure Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe AWD)

Scheme 22

Scheme 22: Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe FWD)
Scheme 22: Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe FWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Pipe Procedure Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission System Hose/Pipe Replacement (Canister to Pipe FWD)

Scheme 23

Scheme 23: Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)
Scheme 23: Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Pipe Procedure Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister AWD)

Scheme 24

Scheme 24: Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister FWD)
Scheme 24: Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister FWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement .
1Evaporative Emission Pipe Procedure Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission System Hose/Pipe Replacement (Fuel Pump Module to Canister FWD)

Scheme 25

Scheme 25: Evaporative Emission Canister Replacement (AWD)
Scheme 25: Evaporative Emission Canister Replacement (AWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement . Remove the evaporative emission pipes. Refer to Plastic Collar Quick Connect Fitting Service .
1Evaporative Emission Canister
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission Canister Replacement (AWD)

Scheme 26

Scheme 26: Evaporative Emission Canister Replacement (FWD)
Scheme 26: Evaporative Emission Canister Replacement (FWD)
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedures Remove the fuel tank. Refer to Fuel Tank Replacement . Remove the evaporative emission pipes. Refer to Plastic Collar Quick Connect Fitting Service .
1Evaporative Emission Canister
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission Canister Replacement (FWD)

Scheme 27

Scheme 27: Evaporative Emission Canister Purge Solenoid Valve Replacement
Scheme 27: Evaporative Emission Canister Purge Solenoid Valve Replacement
CalloutComponent Name
WARNING: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. Preliminary Procedure Disconnect purge solenoid quick connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
1Fuel Ventilation Pipe
2Evaporative Emission Canister Purge Solenoid Valve Procedure Disconnect the electrical connector.
WARNING
Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Evaporative Emission Canister Purge Solenoid Valve Replacement

Ignition Coil Replacement

Special tools

  1. EN-6009 Remover and Installer Ignition Coil

For equivalent regional tools refer to Special Tools .

  1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/encore/i-2012-2016/remont/body-electrical/#battery-charging-system-and-starting-system) .
  2. Remove the engine cover. Refer to Refer to «Engine Cover Replacement»(ref-614552-S23407649322014050700000) .
  3. Disconnect the ignition coil wiring harness connector (1).
  4. Remove the 2 ignition coil fasteners (2) from the ignition coil assembly (3).
  5. Install the EN-6009 remover/installer (1).
  6. Remove the ignition coil (2).
  7. Remove the EN-6009 remover/installer (1).
  1. Install the EN-6009 remover/installer (1).
  2. Install the ignition coil assembly (2).
  3. Remove the EN-6009 remover/installer (1).
  4. Install the 2 ignition coil assembly fasteners (2) and tighten to 8 (71 lb in).
  5. Connect the ignition coil plug (1).
  6. Install the engine cover. Refer to Refer to «Engine Cover Replacement»(ref-614552-S23407649322014050700000) .
  7. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/encore/i-2012-2016/remont/body-electrical/#battery-charging-system-and-starting-system) .

Description

The engine control module (ECM) learns the airflow through the throttle body to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to throttle body coking. Anytime the throttle body airflow rate changes, for example due to cleaning or replacing, the values must be relearned.

An engine that had a heavily coked throttle body that has been cleaned or replaced may take several drive cycles to unlearn the coking. To accelerate the process, the scan tool has the ability to reset all learned values back to zero. A new ECM will also have values set to zero.

The idle may be unstable or a DTC may set if the learned values do not match the actual airflow.

Conditions for Running the Throttle Learn Procedure

Scan tool Idle Learn or Idle Learn Reset Procedure

  1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201-P0208, P0220, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0279, P0280, P0282, P0283, P0300-P0308, P0351-P0358, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
  2. Ignition ON, engine OFF.
  3. The vehicle speed sensor (VSS) is 0 km/h (0 mph).

Service Bay/On Road Learn Procedure

  1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201-P0208, P0220, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0279, P0280, P0282, P0283, P0300-P0308, P0351-P0358, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
  2. The engine speed is between 450-4,000 RPM.
  3. The manifold absolute pressure (MAP) is greater than 5 kPa.
  4. The mass air flow (MAF) is greater than 2 g/s.
  5. The ignition voltage is greater than 10 volts.

Throttle Learn

Scan Tool Idle Learn or Idle Learn Reset Procedure - Performed after the throttle body is cleaned or replaced

  1. Ignition ON, engine OFF, perform the Idle Learn or Idle Learn Reset in Configuration/Reset or Module Setup.
  2. Engine idling, observe the scan tool Throttle Body Idle Airflow Compensation parameter. The Throttle Body Idle Airflow Compensation value should equal 0 % and the engine should be idling at a normal idle speed.
  3. Clear the DTCs and return to the diagnostic that referred you here.

Service Bay/On Road Idle Learn Procedure - Performed after the ECM is programmed or replaced

  1. Engine idling for 3 min.
  2. Observe the scan tool Desired Idle Speed and the actual Engine Speed parameters.
  3. The ECM will start to learn the new idle cells and the Desired Idle Speed should start to decrease.
  4. Ignition OFF for 60 s.
  5. Start and idle the engine for 3 min.
  6. After the 3 min run time the engine should be idling normal. NOTE: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn. If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.
  7. After the drive cycle, the engine should be idling normally. If the engine idle speed has not been learned, turn OFF the ignition for 60 s and repeat step 6.
  8. Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

Spark Plug Usage

  1. Ensure that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to the Electronic Parts Catalog.
  2. Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions: Spark plug fouling-Colder plug Pre-ignition causing spark plug and/or engine damage-Hotter plug

Spark Plug Inspection

  1. Inspect the terminal post (1) for damage. Inspect for a bent or broken terminal post (1). Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
  2. Inspect the insulator (2) for flashover or carbon tracking, soot. This is caused by the electrical charge traveling across the insulator (2) between the terminal post (1) and ground. Inspect for the following conditions: Inspect the spark plug boot for damage. Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes arcing to ground.
  3. Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
  4. Inspect for evidence of improper arcing. Measure the gap between the center electrode (4) and the side electrode (3) terminals. An excessively wide electrode gap can prevent correct spark plug operation. Inspect for the correct spark plug torque. Insufficient torque can prevent correct spark plug operation. An over torqued spark plug, causes the insulator (2) to crack. Inspect for signs of tracking that occurred near the insulator tip instead of the center electrode (4). Inspect for a broken or worn side electrode (3). Inspect for a broken, worn, or loose center electrode (4) by shaking the spark plug.
  5. A rattling sound indicates internal damage.
  6. A loose center electrode (4) reduces the spark intensity. Inspect for bridged electrodes (3, 4). Deposits on the electrodes (3, 4) reduce or eliminates the gap. Inspect for worn or missing platinum pads on the electrodes (3, 4) If equipped. Inspect for excessive fouling. Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during installation.

Spark Plug Visual Inspection

  1. Normal operation-Brown to grayish-tan with small amounts of white powdery deposits are normal combustion by-products from fuels with additives.
  2. Carbon Fouled-Dry, fluffy black carbon, or soot caused by the following conditions: Rich fuel mixtures Leaking fuel injectors Excessive fuel pressure Restricted air filter element Incorrect combustion Reduced ignition system voltage output Weak coils Worn ignition wires Incorrect spark plug gap Excessive idling or slow speeds under light loads can keep spark plug temperatures so low that normal combustion deposits may not burn off. Deposit Fouling-Oil, coolant, or additives that include substances such as silicone, very white coating, reduces the spark intensity. Most powdery deposits will not effect spark intensity unless they form into a glazing over the electrode.

Scheme 28

Scheme 28: Spark Plug Replacement
Scheme 28: Spark Plug Replacement
CalloutComponent Name
Preliminary Procedure Remove the ignition coil. Refer to Ignition Coil Replacement .
1Spark Plugs CAUTION: Refer to Component Fastener Tightening Caution . Tighten 25 (18 lb ft)

Spark Plug Replacement

  1. Disconnect the intake camshaft position actuator solenoid valve wiring harness plug (3).
  2. Disconnect the exhaust camshaft position actuator solenoid valve wiring harness plug (2).
  3. Unclip ECM wiring harness (1) from camshaft cover.
  4. Remove the 4 camshaft position actuator solenoid valve bolts (1).
  5. Carefully rotate the intake camshaft position actuator solenoid valve (1) counter clockwise as shown.
  6. Carefully rotate the exhaust camshaft position actuator solenoid valve (2) clockwise as shown.
  7. Carefully remove the 2 camshaft position actuator solenoid valves (2) and the seal rings (1).
  1. Carefully install the 2 camshaft position actuator solenoid valves (2) and the 2 seal rings (1) by gently pressing into position.
  2. Install the 4 camshaft position actuator solenoid valve bolts (1) and tighten to 8 N.m (71 lb in).
  3. The 2 camshaft position actuator solenoid valves should be installed in the position as shown (1) and (2).
  4. Clip ECM wiring harness (1) to camshaft cover.
  5. Connect the exhaust camshaft position actuator solenoid valve wiring harness plug (2).
  6. Connect the intake camshaft position actuator solenoid valve wiring harness plug (3).

Scheme 29

Scheme 29: Crankshaft Position Sensor Replacement
Scheme 29: Crankshaft Position Sensor Replacement
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the splash shield cover. Remove the transfer case, if equipped. Refer to Transfer Case Replacement .
1Crankshaft Position Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 8 (71 lb in)
2Crankshaft Position Sensor Procedure Disconnect the electrical wiring harness connector from the crankshaft position sensor. After replacement of the crankshaft position sensor, use a scan tool to speed up the learn process. Refer to Crankshaft Position System Variation Learn .
CAUTION
Refer to Fastener Caution .

Crankshaft Position Sensor Replacement

Scheme 30

Scheme 30: Camshaft Position Sensor Replacement
Scheme 30: Camshaft Position Sensor Replacement
CalloutComponent Name
Preliminary Procedures Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
1Camshaft Position Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 6 N.m (53 lb in)
2Camshaft Position Sensor Procedure Disconnect the electrical wiring harness connector from the camshaft position sensor.
3Camshaft Position Sensor Seal
CAUTION
Refer to Fastener Caution .

Camshaft Position Sensor Replacement

Scheme 31

Scheme 31: Knock Sensor Replacement
Scheme 31: Knock Sensor Replacement
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Disconnect the electrical wiring harness connector.
1Knock Sensor Fastener CAUTION: Refer to Fastener Caution . Tighten 20 (15 lb ft)
2Knock Sensor
CAUTION
Refer to Fastener Caution .

Knock Sensor Replacement

Scheme 32

Scheme 32: Air Cleaner Inlet Duct Replacement
Scheme 32: Air Cleaner Inlet Duct Replacement
CalloutComponent Name
1Air Cleaner Inlet Duct Procedure Remove the air cleaner inlet duct by pulling upward to release the inlet duct from the rubber grommets and the air cleaner assembly.

Air Cleaner Inlet Duct Replacement

Scheme 33

Scheme 33: Air Cleaner Outlet Duct Replacement
Scheme 33: Air Cleaner Outlet Duct Replacement
CalloutComponent Name
1Air Cleaner Outlet Duct Clamps (Qty 2) CAUTION: Refer to Fastener Caution .
2Air Cleaner Outlet Duct
CAUTION
Refer to Fastener Caution .

Air Cleaner Outlet Duct Replacement

Scheme 34

Scheme 34: Air Cleaner Element Replacement
Scheme 34: Air Cleaner Element Replacement
CalloutComponent Name
Preliminary Procedures Disconnect the mass airflow sensor electrical connector. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
1Air Cleaner Housing Fasteners (Qty: 2)
2Air Cleaner Housing
3Air Cleaner Element

Air Cleaner Element Replacement

Scheme 35

Scheme 35: Air Cleaner Assembly Replacement
Scheme 35: Air Cleaner Assembly Replacement
CalloutComponent Name
Preliminary Procedures Disconnect the mass airflow sensor electrical connector. Remove the air cleaner inlet duct. Refer to Air Cleaner Inlet Duct Replacement . Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
1Air Cleaner Assembly Procedure Remove the air cleaner assembly by pulling upward to release the assembly from the lower rubber grommets and then pulling outward from the fender.

Air Cleaner Assembly Replacement

Scheme 36

Scheme 36: Charge Air Cooler Replacement
Scheme 36: Charge Air Cooler Replacement
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the front fascia. Refer to Front Bumper Fascia Replacement (Trax) , Front Bumper Fascia Replacement (Encore) . Remove the charge air cooler inlet air hose from the charge air cooler. Refer to Charge Air Cooler Inlet Air Hose Replacement . Remove the charge air cooler outlet air hose from the charge air cooler. Refer to Charge Air Cooler Outlet Air Hose Replacement . Remove the lower impact bar. Refer to Front Bumper Lower Impact Bar Replacement (Trax) . Remove the radiator air lower baffle and deflector. Refer to Radiator Air Lower Baffle and Deflector Replacement (LUJ, LUV) .
1Charge Air Cooler Fasteners (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 10 (89 lb in)
2Charge Air Cooler
CAUTION
Refer to Fastener Caution .

Charge Air Cooler Replacement

  1. Remove the front bumper fascia. Refer to «Front Bumper Fascia Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) , «Front Bumper Fascia Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .
  2. Loosen the charge air cooler inlet air pipe clamp (1) at the turbocharger outlet.
  3. Unclip the retainer spring (1) at the charge air cooler inlet.
  4. Remove the charge air cooler inlet air hose (2) from the charge air cooler (3) and remove the hose from the vehicle.
  1. Install the charge air cooler inlet air hose (2) to charge air cooler (3).
  2. Clip the in retainer spring (1).
  3. Install the charge air cooler inlet air pipe to the turbocharger outlet.
  4. Tighten the clamp (1).
  5. Install the front bumper fascia. Refer to «Front Bumper Fascia Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) , «Front Bumper Fascia Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .
  1. Remove the front bumper fascia. Refer to «Front Bumper Fascia Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) , «Front Bumper Fascia Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .
  2. Disconnect the intake air pressure and temperature sensor electrical connector.
  3. Loosen the clamp (1) at the charge air cooler outlet pipe (2) to throttle body (3).
  4. Remove the fasteners (1) from the charge air cooler outlet air pipe to frame bracket (2).
  5. Unclip the retainer spring (1).
  6. Remove the charge air cooler outlet air hose (2) from the charge air cooler (3).
  1. Install the charge air cooler outlet air hose (2) to charge air cooler (3).
  2. Clip the in retainer spring (1).
  3. Install the fasteners (1) to the charge air cooler outlet air pipe to frame bracket (2).
  4. Install the charge air cooler inlet air pipe to the turbocharger.
  5. Tighten the clamp (1).
  6. Connect the intake air pressure and temperature sensor electrical connector.
  7. Install the front bumper fascia. Refer to «Front Bumper Fascia Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) , «Front Bumper Fascia Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exterior-body-panels/#bumpers-and-fascias) .

Scheme 37

Scheme 37: Charge Air Bypass Regulator Solenoid Valve Replacement
Scheme 37: Charge Air Bypass Regulator Solenoid Valve Replacement
CalloutComponent Name
Preliminary Procedure Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
1Charge Air Bypass Regulator Solenoid Valve Hose (Qty: 3) Procedure Disconnect the electrical connector.
2Charge Air Bypass Regulator Solenoid Valve

Charge Air Bypass Regulator Solenoid Valve Replacement

See also:
• Battery Negative Cable Disconnection and Connection
• Fastener Caution
• Control Module References
• Diagnostic Trouble Code (DTC) List - Vehicle
• Cooling System Draining and Filling
• Lifting and Jacking the Vehicle
• Heated Oxygen Sensor Resistance Learn Reset Caution
• Component Fastener Tightening Caution
• Front Compartment Front Center Insulator Replacement
• Gasoline/Gasoline Vapors Warning
• Exhaust Muffler Replacement (LUV)
• Two-Piece Propeller Shaft Replacement
• Tire and Wheel Removal and Installation
• Special Tools (Diagnostic Tools)
• Quarter Lower Rear Trim Panel Replacement
• Relieving Fuel Pressure Warning
• Transfer Case Replacement
• Front Bumper Fascia Replacement (Trax)
• Charge Air Cooler Outlet Air Hose Replacement
• Fuel Sender Assembly Replacement (AWD)
• Fuel Pressure Relief
• Fuel Tank Draining
• Fuel Tank Fuel Pump Module Replacement (AWD)
• Ignition Coil Replacement
• Crankshaft Position System Variation Learn

More articles — Engine Performance