Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Check for a contaminated HO2S. Silicone contamination of HO2S can cause a low signal voltage to be indicated. Silicone contamination is indicated by a powdery white deposit on portion of HO2S exposed to exhaust stream. Before replacing HO2S determine cause of contamination and correct the condition.

If a DTC P0133 is intermittent, driving vehicle under conditions outlined in INSPECTION/MAINTENANCE EVAP SYSTEM SET PROCEDURE , can verify whether fault is present. See INSPECTION/MAINTENANCE HEATED OXYGEN SENSOR/OXYGEN SENSOR (HO2S/O2S) SYSTEM SET PROCEDURE under INSPECTION/MAINTENANCE PROCEDURES (DRIVE CYCLES). An intermittent malfunction may be caused by fault in the HO2S 1 electrical circuit. Check wiring harness and components for any intermittent conditions. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 1.8L VIBE article. Information included in freeze frame data can be useful in determining vehicle operating conditions when DTC first set.