Engine Controls - Symptom Charts (Hybrid): Other Ford C-MAX II

Chart 1

1. Engine Runs Rough
2. Engine Misses
3. Stalls/Quits: Idle, Acceleration, Cruise
4. Buck/Jerk
5. Hesitation/Stumble
6. Surge
7. Unique Idle Concerns: Rolling Idle

Note. Activate the engine running diagnostic mode to determine if the vehicle is exhibiting a stall/quits at idle or a no start/normal crank concern. Refer to DIAGNOSTIC MODES for additional information.

Note. The engine may stall if left running while refueling, or it may restart if the ignition is not cycled to ACC or OFF position before refueling. Advise the customer to turn the engine off while refueling to avoid contamination or damage to the evaporative emission (EVAP) system.

Chart 2

1. Engine/Vehicle Starting Concerns: No Start/Vehicle Disabled

Chart 3

1. Engine/Vehicle Starting Concerns: No Start/Normal Crank

Note. Activate the engine running diagnostic mode to determine if the vehicle is exhibiting a stall/quits at idle or a no start/normal crank concern. Refer to DIAGNOSTIC MODES for additional information.

Chart 4

1. Engine Backfires

Chart 5

1. Lack/Loss of Power

Note. Verify the symptom is reported under normal driving conditions without excessive engine or vehicle load. Also, be aware of the engine RPM or speed limiting functions of the PCM.

Chart 6

1. Engine Spark Knock

Chart 7

1. Poor Fuel Economy

Note. Since driving styles can have a significant influence on fuel economy, verify the concern before starting the diagnosis. Also, the following external factors may contribute to poor fuel economy conditions

1. stop and go driving
2. incorrect tire pressure or size
3. vehicle loads (such as trailer towing)
4. extended winter warm-up conditions
5. high speed driving
6. regenerative braking disabled
7. high voltage traction battery temperatures
8. incorrect axle ratio
9. road or weather conditions
10. aftermarket add-ons
11. short run operations
12. customer expectations

Chart 8

1. Emissions Compliance

Chart 9

1. Warning Indicators: Malfunction Indicator Lamp (MIL), Hazard Indicator Lamp, Powertrain Malfunction Indicator (Wrench) Lamp, Temperature Warning Indicator Lamp, Check Fuel Cap Indicator

Note. If the symptom is both MIL ON and exhaust emission test failure, GO directly to Chart 8. If the vehicle is disabled, GO directly to Chart 2. If the engine is a no start, GO directly to Chart 3. If the engine runs rough at idle, GO directly to Chart 1.

Chart 10

1. Oil System Concerns: High Oil Consumption, Leaks

Chart 11

1. Cooling System Concerns: Electric Engine Cooling Fan Does Not Operate

Chart 12

1. Cooling System Concerns: Electric Engine Cooling Fan Always Runs

Note. This chart is intended to only diagnose an electric engine cooling fan that always runs with a cool engine and the A/C and defroster off.

Chart 13

1. Exhaust System Concerns: Visible Smoke

Note. Black smoke indicates a rich fuel mixture, blue smoke indicates burning oil, and white smoke indicates water in the combustion chamber.

Chart 14

1. Fuel System Concerns: Fuel Odor, Engine Compartment

Chart 15

1. Engine Noise (Under Hood)

Note. Attempt to identify the source of the noise. If the noise is from a source other than those listed below, refer to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX (for noise such as spark knock) or the applicable service information to continue diagnosis.

Chart 16

1. Exhaust System Concerns: Odor (Sulfur Or Rotten Egg Smell)

Note. A slight sulfur smell may be normal. Catalysts with less than 8, 000-16, 000 kilometers (5, 000-10, 000 miles) (new vehicle or catalyst) are likely to have a sulfur smell due to the highly active state of new catalysts. Installing a new catalyst may actually make the symptom worse.