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Home >> Buick >> 1989 >> Reatta >> Repair and Diagnosis >> Engine Performance >> System >> 3.3L/3.8L PFI Tests W/Codes >> Diagnostic Trouble Code Charts: 13-66 >> Code 45: Rich Exhaust Indicator >> Notes

Code 45: Rich Exhaust Indicator: Notes

Code 45 is set if no Code 21 or 22 is set and the O2 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 (3.3L) or .7-1.4 volts (3.8L).