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Home › Oldsmobile › 1990 › Cutlass Calais Base, 2D Coupe, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - 2.3L PFI › Diagnostic Tests › Code 45: Rich Exhaust Indicated › Notes

Code 45: Rich Exhaust Indicated: Notes

  1. The following conditions must be met to set a Code 45:
    • O2 sensor voltage is greater than .75 volt.
    • No Code 33 or 34.
    • Fuel system in "closed loop".
    • TPS greater than 5 percent.
    • Above conditions met for 50 seconds.
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