Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent could be the result of the following conditions:
- Poor electrical connection.
- Moisture in the connectors or wiring.
- Rubbed-through wire insulation.
- Broken wire inside of the insulation.
Inspect for a poor electrical connection or a damaged harness. Inspect the harness electrical connectors for the following conditions:
- Improper mating.
- Broken locks.
- Improperly formed electrical connectors.
- Damaged terminals.
- A poor terminal to wire connection.
- A damaged harness.
Replace the entire HO2S 2 assembly. DO NOT attempt to repair the HO2S 2 if the following conditions exist:
- Damaged wiring.
- Damaged electrical connector.
- Damaged terminals.
Obstruction of the air reference and degraded HO2S 2 performance could result in any attempt to repair the above conditions. The HO2S 2 must have a clean air reference in order for the HO2S 2 to function properly. This clean air reference is obtained by way of the HO2S 2 wires.