| POSSIBLE CAUSE |
- Drive-by-wire control system operates with brake override system
- Poor fuel quality
- Air leakage or restriction from intake-air system
- Air cleaner restriction or dirty
- Charge air cooler malfunction
- Loose turbocharger to intake manifold duct connecting
- Leakage at exhaust manifold or turbocharger mounting flange
- Vacuum leakage
- Brake dragging
- Clutch slippage
- PCM DTC is stored
- Engine overheating
- EGR system malfunction
- Improper operation of A/C cut-off system
- Improper operation of drive-by-wire control system
- Throttle body malfunction
- Variable swirl system malfunction
- Improper operation of variable valve timing control system
- Purge solenoid valve malfunction
- Fuel pump speed control system malfunction
- Wastegate control system malfunction
- Erratic signal to PCM
- APP sensor or related circuit malfunction
- ECT sensor No.1 or related circuit malfunction
- IAT sensor (integrated in MAF/IAT sensor) or related circuit malfunction
- MAF sensor (integrated in MAF/IAT sensor) or related circuit malfunction
- MAP sensor (integrated in MAP sensor/boost air temperature sensor) or related circuit malfunction
- Boost air temperature sensor (integrated in MAP sensor/boost air temperature sensor) or related circuit malfunction
- TP sensor or related circuit malfunction
- Fuel pump relay or related circuit malfunction
- VSS or related circuit malfunction
- Erratic or no signal from CMP sensor
- Loose installation
- Damaged trigger wheel (camshaft)
- Open or short circuit in related wiring harness
- Erratic signal from CKP sensor
- Loose installation
- Damaged trigger wheel (crankshaft pulley)
- Open or short circuit in related wiring harness
- Ignition system malfunction
- Spark plug malfunction
- Ignition coil malfunction
- Ignition coil related wiring harness malfunction
- Incorrect signal to ignition coil
- Exhaust system and/or TWC restriction
- Turbocharger malfunction
- Turbocharger routing assembly binding or dragging
- Fuel leakage
- Inadequate fuel pressure (high or low pressure side)
- Fuel pressure sensor malfunction
- High pressure fuel pump malfunction
- Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system)
- Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction
- Relief valve (built-into fuel delivery pipe) malfunction
- Fuel line restricted or clogged
- Fuel pump mechanical malfunction
- Incorrect fuel injection timing
- Fuel injector malfunction
- Improper valve timing due to jumping out timing chain
- Low engine compression
- PCV valve malfunction
- Fuel injector control driver (built-into PCM) malfunction
- Engine internal part malfunction
WARNING:
- The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
- 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 injury 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 possibly cause damage to the fuel pipe and 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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