Diagnostic Aids
WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. 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, P1416 or an intermittent complaint. Also check for the following conditions:
- Pinched, kinked, or restricted AIR pipes, hoses, or fittings.
- Leaks, holes, loose fittings, or hoses.
- Restricted or obstructed AIR pump inlet .
- An AIR supply hose that is melted before check valve could indicate exhaust gas back-flow past check valve.
An intermittent may be caused by a poor connection, rubbed through wire insulation, or a broken wire inside the insulation. Thoroughly check any circuitry that is suspected of causing intermittent complaint for the following conditions:
- Backed out terminals.
- Improper mating.
- Broken locks.
- Improperly formed or damaged terminals.
- Poor terminal to wire connections.
- Physical damage to wiring harness.
- Corrosion.
- Moisture in connector.