Checking Components
Check the intake system for air leakage
Check the fuel and residual pressure. Check for high fuel pressure. Check for leaking injectors.
Check the mass air flow (MAF) sensor. Read off its correction factor. The value must be between 0.8 and 1.2.
Check the engine oil visually for contaminants.
Check that the oil level is between the minimum and maximum markings on the dipstick.
NOTE:
There must not be any air leakage when this test is carried out.
HINT: If the above fault-tracing does not remedy the fault, try replacing the heated oxygen sensor (HO2S), as the diagnostic trouble code (DTC) can also be stored by a damaged heated oxygen sensor (HO2S).
Remedy as necessary.
Other information
- see AIR LEAKS IN THE INTAKE SYSTEM, CHECKING
- see FUEL SYSTEM PRESSURE, CHECKING
- see MASS AIR FLOW (MAF) SENSOR
- see OXYGEN SENSOR (CATALYST MONITOR SENSOR)
- Continue
Refer to VERIFICATION