Symptoms Verification

The engine control module (ECM) and the malfunction indicator lamp (MIL) are operating correctly.
There are no DTCs stored.
The scan tool data is within the normal operating range.
Bulletins are not available for the current symptom.
The ECM grounds are clean, tight, and in the correct locations.
The vehicle tires are correctly inflated and meet original equipment specifications.
The air filter element is not restricted.
If equipped, inspect the hydro-carbon (HC) absorber in the air cleaner assembly for ruptures that would leak charcoal into the air intake, contaminating the sensing element of the mass air flow (MAF) sensor.