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.
A low AIR system volume may cause a DTC P1415 or P1416, or an intermittent complaint. Also check for the following conditions:
- Pinched, kinked, or restricted AIR pipes, hoses or fittings.
- Leaks, holes, and loose fittings or hoses.
- A restricted or obstructed AIR pump inlet, duct or filter.
- Leaks or restrictions in the vacuum hoses for the AIR shut-off valve.
An AIR supply hose that is melted before the check valve may indicate exhaust gas back-flow past the check valve.
An intermittent may be caused by any of the following conditions:
- Moisture, water, or debris ingestion into AIR pump.
- Excessive exhaust system back pressure.