| POSSIBLE CAUSE |
- Drive-by-wire control system operates with brake override system.
- Air cleaner restriction
- Clutch slippage (MTX)
- Electrical connector disconnected
- Poor fuel quality
- Ignition wiring malfunction
- Air leakage from intake air system
- Intake air system restriction
- Poor installation of EGR valve
- Improper operation of drive-by-wire control system
- Vacuum leakage
- Engine mount installation loose
- PCM DTC is stored.
- Engine overheating
- Throttle valve restriction or clogged
- Erratic signal to PCM
- APP sensor malfunction
- TP sensor malfunction
- MAP sensor malfunction
- BARO sensor malfunction
- CKP sensor or related wiring harness malfunction
- MAF 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
- Exhaust system part malfunction
- Excessive or insufficient fuel pressure
- Fuel pump relay or fuel pump circuit malfunction
- Restriction in fuel line
- Pressure regulator malfunction (built-into fuel pump unit)
- Fuel pump unit malfunction
- Fuel leakage from fuel system
- Fuel injector malfunction
- Improper operation of A/C control system
- Improper operation of cruise control system
- A/F sensor malfunction
- Fuel shut-off valve malfunction
- Purge solenoid valve malfunction
- EVAP control system malfunction
- CMP sensor and teeth of camshaft malfunction
- Improper operation of variable valve timing control system
- Improper operation of EGR system
- Low engine compression
- Improper valve timing
- Check valve (two-way) malfunction
- PCV valve malfunction
- ATX internal malfunction (ATX)
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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