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1989 Chevrolet C2500 Cheyenne 5.7L Excessive Emissions, MIL Lamp on
Posted to GM Driveability on 8/30/2000

Good Afternoon

Truck will start and run so rich the O2 will stay rich and set code 45. This also keeps it from going into closed loop. If you run the engine at 2000 RPM it will clean up. The CO will go to .00 and Hc will go below 30, CO2 goes up and O2 goes d...

  Related Documents & Media  1989 Chevrolet C2500 Cheyenne

 
Message Closed w/FIX

car Vehicle Data

1989 Chevrolet C2500 Cheyenne

VIN 1GCFC24K4K
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsCA
SymptomsExcessive Emissions, MIL Lamp On
OccursAlways
Misc.2WD

Trouble Codes

43Knock sensor
45Rich Exhaust
Message Closed w/FIX

car Vehicle Data

1989 Chevrolet C2500 Cheyenne

VIN 1GCFC24K4K
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsCA
SymptomsExcessive Emissions, MIL Lamp On
OccursAlways
Misc.2WD

Trouble Codes

43Knock sensor
45Rich Exhaust