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Home >> Oldsmobile >> 1990 >> Cutlass Calais Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.3L PFI >> Diagnostic Tests >> Code 45: Rich Exhaust Indication >> Notes

Code 45: Rich Exhaust Indication: Notes

Code 45 is set if no Code 21 or 22 is set and the oxygen sensor signal voltage or circuit No. 412 remains greater than .75 volt for 2 minutes in closed loop, engine time after start is one minute or more and TPS voltage is .52-1.1 volts.

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