Diagnostic Aids
- A fuel system delivery condition causes this DTC to set. Thoroughly inspect all items that cause a lean condition. Refer to FUEL SYSTEM DIAGNOSIS .
- Any un-metered air into the engine causes this DTC to set. Thoroughly inspect all areas of the engine for vacuum leaks.
- A MAF sensor condition can cause this DTC without setting a MAF DTC. If there is a MAF sensor condition, the MAF sensor parameters will appear to be within range.
- Inspect the PCV valve for being the correct one for this application. Inspect the air filter for being the correct one for this application. Make sure that the engine oil fill cap is in place and that it is tight. Verify that the engine oil dip stick is fully seated.