Mike's Workshop Manuals
: Service manuals for every vehicle
Home
>>
Oldsmobile
>>
1995
>>
Ninety-Eight 3.8 1
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Tests W/Codes
>>
ECM/Pcm Code Charts
>>
Code P1640, QDM No. 1 Circuit
>>
Action Taken
Action Taken
PCM will illuminate Malfunction Indicator Light (MIL).