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Home >> Chevrolet >> 1994 >> Chevy Van G10, 5.0 H >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - Tests W/Codes - 7.4L) >> Trouble Code Charts >> Code 45, Rich Exhaust Indication >> O2 Sensor Contamination

O2 Sensor Contamination

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

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