| POSSIBLE CAUSE |
- Drive-by-wire control system operates in brake override system
- Poor fuel quality
- Air leakage from intake air system
- Intake air system restriction
- Improper installation of EGR valve
- Vacuum leakage
- PCM DTC is stored
- Engine overheating
- APP sensor malfunction
- TP sensor malfunction
- CKP sensor or related wiring harness malfunction
- MAF sensor or related wiring harness malfunction
- IAT sensor or related wiring harness malfunction
- Battery power supply circuit malfunction
- VSS or related wiring harness malfunction
- CKP sensor and teeth of crankshaft pulley malfunction
- Spark plug malfunction
- Fuel leakage from fuel injector
- Fuel injector is clogging
- Improper operation of electronic throttle control system
- Exhaust system part malfunction
- Excessive fuel pressure
- Improper operation of variable tumble control
- Improper operation of variable intake air control
- Improper operation of A/C system
- Purge solenoid valve malfunction
- Evaporative emission control system malfunction
- CMP sensor and teeth of camshaft malfunction
- EGR valve malfunction
- Improper operation of variable valve timing control system
- Low engine compression
- Improper valve timing
- PCV valve malfunction
- Brake dragging
WARNING:
- The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
- Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
- Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION
.) (See AFTER SERVICE PRECAUTION
.)
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
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