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1991 Pontiac Firebird 3.1L MIL Lamp on
Posted to GM Driveability on 1/4/2008 4 Replies

Help!!!! This firebird initially came in for an oil leak. I replaced the distributor o-ring and fixed the leak. Approximately 45 days later it came back with the MIL illuminated and a hard code 42 (est ckt open/grounded) and a lack of power complaint. Followin...

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  Related Documents & Media  1991 Pontiac Firebird

 
Message Closed w/Summary

car Vehicle Data

1991 Pontiac Firebird

VIN 1G2FS23T7M
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
EmissionsUS FEDERAL
SymptomsMIL Lamp On
OccursAlways
Misc.Prom Id #721

Trouble Codes

42EST ckt. open or grounded
Message Closed w/Summary

car Vehicle Data

1991 Pontiac Firebird

VIN 1G2FS23T7M
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
EmissionsUS FEDERAL
SymptomsMIL Lamp On
OccursAlways
Misc.Prom Id #721

Trouble Codes

42EST ckt. open or grounded