Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for any condition that would cause the ECM to receive a false BARO reading including the following:
- A skewed EGR vacuum sensor.
- A skewed BARO sensor.
- High circuit resistance, inspect for the following conditions:
- Rubbed wire insulation.
- Wire corrosion.
- Terminal corrosion.
- If an intermittent condition exists, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.