Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The scan tool can be used to control the suspected cylinder (Inj. Balance Test).
The most likely cause for this DTC is the following the following conditions:
- A mechanical failure causing low cylinder compression in more than one cylinder.
- A fuel leak at the high pressure fuel injection lines or injection nozzles.
- A fuel injection nozzles stuck closed.
After the repair has been performed, the vehicle may take approximately 30 seconds to return to a stable idle.