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Home >> Oldsmobile >> 1992 >> Toronado Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Tests W/Codes - 3.4L PFI) >> Pcm/BCM Code Charts >> Code 45, Rich Exhaust Indication >> O2 Sensor Contamination

O2 Sensor Contamination

WARNING: This page is about a different car, the 1992 Pontiac Grand Prix, 1992 Oldsmobile Cutlass Supreme, and 1992 Chevrolet Lumina. However, it is still accessible from the selected car via links, so may be relevant.

O2 sensor contamination, caused by silicone in certain fuels or use of improper RTV sealant, may cause a white powdery coating to cover exterior of O2 sensor. False high signal voltage (low oxygen content sensed) produced is interpreted by control module as a rich mixture, causing control module to set Code 45.

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