Mike's Workshop Manuals
: Service manuals for every vehicle
Home
>>
Pontiac
>>
2002
>>
Firebird Formula, Automatic
>>
Repair and Diagnosis
>>
Electrical
>>
Charging Systems
>>
Diagnostic Tests
>>
DTC P1637: Output Driver Module Malfunction
>>
Conditions For Setting DTC
Conditions For Setting DTC
An improper voltage level has been detected on the alternator lamp driver circuit.
Above conditions for at least 30 seconds.