TROUBLE CODE DEFINITION
| Code | Circuit Affected | Probable Cause |
|---|---|---|
| 11 | Crankshaft Position Sensor | No Reference Signal |
| 12 | Starter Switch | Switch/Wiring Defective |
| 13 | Camshaft Position Sensor | Open/Short Circuit Or Defective Sensor |
| 14 | Fuel Injector No 1 | Injector/Harness Defective |
| 15 | Fuel Injector No 2 | Injector/Harness Defective |
| 16 | Fuel Injector No 3 | Injector/Harness Defective |
| 17 | Fuel Injector No 4 | Injector/Harness Defective |
| 21 | Coolant Temperature Sensor | Open/Short Circuit Or Defective Sensor |
| 23 | Mass Airflow Sensor | Open/Short Circuit Or Defective Sensor |
| 24 | Idle Air Control Solenoid Valve | Open/Short Circuit Or Defective Solenoid |
| 31 | Throttle Position Sensor | Open/Short Circuit Or Defective Sensor |
| 32 | Oxygen Sensor (O2S) | Open/Short Circuit Or Defective Sensor |
| 33 | Vehicle Speed Sensor No 2 | Open/Short Circuit Or Defective Sensor |
| 34 | EGR Solenoid Valve | Open/Short Circuit Or Defective Solenoid |
| 35 | Purge Control Solenoid Valve | Open/Short Circuit Or Defective Solenoid |
| 36 | Air Suction Solenoid Valve | Open/Short Circuit Or Defective Valve |
| 41 | Air/Fuel Learning Control | Faulty Lean Control Function |
| 51 | Neutral Position Switch (M/T) | Open/Short Circuit Or Defective Switch |
| 51 | Inhibitor Switch (A/T) | Open/Short, Cable Adjust, Or Def Switch |
| 55 | Recirculation Gas Temp. Sensor | Open/Short Circuit Or Defective Sensor |
| 56 | EGR System | Faulty EGR System Function |
| 61 | Fuel Tank Pressure Control Solenoid Valve (California FWD Model Only) | Control Solenoid Valve Malfunction Or Short Or Open In Harness |
| 62 | Fuel Temperature Sensor (Calif FWD Only) | Short Or Open In Harness |
| 63 | Fuel Tank Pressure Sensor (Calif FWD Only) | Short Or Open In Harness |
OBD TROUBLE CODE IDENTIFICATION CHART - 1.8L
| Code | SSM Title (1) | Circuit Affected | Probable Cause |
|---|---|---|---|
| P0100 | QA | Airflow Sensor Circuit | Open/Short Circuit |
| P0101 | QA-R | Airflow Sensor Circuit Range/Performance Problem | Bad Sensor |
| P0105 | P-S | Pressure Sensor Circuit Malfunction | Open/Short Circuit |
| P0106 | P-R | Pressure Sensor Range/ Performance | Bad Sensor |
| P0115 | TW | Coolant Temperature Sensor Circuit Malfunction | Open/Short Circuit |
| P0120 | THV | Throttle Position Sensor Circuit Malfunction | Open/Short Circuit |
| P0121 | TH-R | Throttle Position Sensor Range/Performance | Bad Sensor |
| P0125 | TW-CL | Coolant Temp Too Low For Closed Loop Control | Bad Sensor |
| P0130 | FO2-V | Front O2 Sensor Circuit Malfunction | Bad Sensor, Bad Fuel |
| P0133 | FO2-R | Front O2 Sensor Circuit Slow Response | Bad Sensor, Bad Fuel |
| P0135 | FO2H | Front O2 Sensor Heater Circuit Malfunction | Open/Short Circuit |
| P0136 | RO2-V | Rear O2 Sensor Circuit Malfunction | Bad Sensor, Bad Fuel |
| P0139 | RO2-R | Rear O2 Sensor Circuit Slow Response | Bad Sensor, Bad Fuel |
| P0141 | RO2H | Rear O2 Sensor Heater Circuit Malfunction | Open/Short Circuit |
| P0170 | FUEL | Fuel Trim Malfunction | Any Part Of Fuel System |
| P0201 | INJ1 | Fuel Injector No 1 | Inoperative Fuel Injector |
| P0202 | INJ2 | Fuel Injector No 2 | Inoperative Fuel Injector |
| P0203 | INJ3 | Fuel Injector No 3 | Inoperative Fuel Injector |
| P0204 | INJ4 | Fuel Injector No 4 | Inoperative Fuel Injector |
| P0301 | MIS-1 | Cylinder 1 Misfire Detected | Bad Igniter |
| P0302 | MIS-2 | Cylinder 2 Misfire Detected | Bad Igniter |
| P0303 | MIS-3 | Cylinder 3 Misfire Detected | Bad Igniter |
| P0304 | MIS-4 | Cylinder 4 Misfire Detected | Bad Igniter |
| P0325 | KNOCK | Knock Sensor Circuit Malfunction | Open/Short Circuit |
| P0335 | CRANK | Crankshaft Position Sensor | Open/Short Circuit, Bad Sensor |
| P0340 | CAM | Camshaft Position Sensor | Open/Short Circuit, Bad Sensor |
| P0400 | EGR | EGR Flow | Faulty EGR Sys. Function |
| P0403 | EGRSOL | EGR Circuit | EGR System Malfunction |
| P0420 | CAT | CAT Efficiency Below Threshold | Bad CAT, Bad Fuel Control |
| P0441 | CPC-F | Incorrect EVAP Purge Flow | Bad Purge Control Solenoid Valve |
| P0443 | CPC | EVAP Circuit Malfunction | Open/Short Circuit |
| P0500 | VSP | Vehicle Speed Sensor | Bad Sensor |
| P0505 | ISC | Idle Control System | Open/Short Circuit, Bad Idle Solenoid |
| P0506 | ISC-L | Idle RPM Too Low | Bad Idle Solenoid, Air By-Pass |
| P0507 | ISC-H | Idle Too High | Idle Solenoid, Air Leaks |
| P0600 | N/A | Serial Communication Link Malfunction | Open/Short Circuit |
| P0601 | RAM | Memory Check Error | ECM |
| P0703 (2) | BRK | Brake Switch Input Malfunction | Faulty Switch, Open/ Short Circuit |
| P0705 (2) | RNG | Transmission Range Sensor Circuit Malfunction | Inhibitor Switch |
| P0710 (2) | ATF | Transmission Fluid Temp. Sensor Circuit Malfunction | ATF Temperature Sensor, Open/Short Circuit |
| P0720 (2) | ATVSP | Output Speed Sensor (VSS No. 1) Circuit Malfunction | VSS No. 1 Failure |
| P0725 (2) | ATNE | Engine Speed Input Circuit Malfunction | TCM, TCM-To-ECM Wiring |
| P0731 (2) | GR_1 | Gear 1 Incorrect Ratio | N/A |
| P0732 (2) | GR_2 | Gear 2 Incorrect Ratio | N/A |
| P0733 (2) | GR_3 | Gear 3 Incorrect Ratio | N/A |
| P0734 (2) | GR_4 | Gear 4 Incorrect Ratio | N/A |
| P0740 (2) | LU_F | Torque Converter Clutch System Malfunction | Duty Solenoid, VSS, Sensor Circuits |
| P0743 (2) | LU | Torque Converter Clutch System Circuit | Duty Solenoid B |
| P0748 (2) | PL | Pressure Control Solenoid Circuit | Duty Solenoid A |
| P0753 (2) | SFT1 | Shift Solenoid "A" Circuit | Shift Solenoid "A" |
| P0758 (2) | SFT2 | Shift Solenoid "B" Circuit | Shift Solenoid "B" |
| P0760 (2) | OVR_F | Shift Solenoid "C" Malfunction | Shift Solenoid "C" |
| P0763 (2) | OVR | Shift Solenoid "C" Circuit | Shift Solnoid "C" Circuit |
| P1100 | ST_SW | Starter Switch Circuit Malfunction | Starter Motor |
| P1101 | N_SW | Neutral Position Switch Circuit Problem (A/T & M/T) | Inhibitor Switch |
| P1102 (2) | BR | Pressure Sources Switching Solenoid Valve Circuit Malfunction | Solenoid Valve Circuit |
| P1103 (2) | TRQ | Engine Torque Control Signal Circuit Malfunction | ECM-To-TCM Harness |
| P1500 | FAN_1 | Cooling Fan No. 1 Circuit Malfunction | Fan Relays |
| P1502 | FAN_F | Cooling Fan Function Problem | Fan Function, Overheating |
| P1700 | ATTH | TP Sensor Circuit Malfunction (A/T) | Throttle Position Sensor - A/T models only. |
| P1701 (2) | CRS | Cruise Control Set Signal Circuit Malfunction (A/T) | TCM-To-CCM Circuit |
| P1702 (2) | ATDIAG | A/T Diagnosis Input Signal Circuit Malfunction | TCM-To-ECM Harness |
| (1) When using Subaru Select Monitor (SSM). (2) Covered in entirety in appropriate TRANSMISSION SERVICE article. | |||
| (1) | When using Subaru Select Monitor (SSM). |
| (2) | Covered in entirety in appropriate TRANSMISSION SERVICE article. |
OBD II DIAGNOSTIC TROUBLE CODE IDENTIFICATION CHART - 2.2L
Diagnosis & Repair Procedure
If only code P0101 is displayed, replace MAF sensor, clear codes and retest. If other codes are displayed, diagnose and repair those codes first and retest.
DTC 507 (ISC_H) - IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED
Note. Refer to illustration for connector and terminal identification. (Схема №11)- (Схема №29).
- Perform tests and repairs for DTC P0505, clear codes and retest.
- Turn ignition to ON. Start engine and allow to idle. Check intake manifold, idle air control solenoid valve and throttle body for loose installation and gasket for cracks, by-pass hose for loose connection or cracking and vacuum hoses for disconnection or cracking. Repair as necessary. If no damage is noted, replace idle air control solenoid valve.