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P1640 Diagnostic Trouble Code Discussion for October 2005

Output Driver 1 Voltage High Input

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Trouble Ticket Help Requests for DTC P1640
Help Request Posted
1998 Saturn SW1 1.9L Excessive Emissions, MIL Lamp on VIN: 1G8ZH8286W
P1640: Output Driver Module 'A' Circuit Malfunction. In MA they do a OBD II check for emmissions, i.e. readiness monitors and codes, the vehicle came to us with a code for P0420A Catylitic converter below efficency. We checked the oxygen sensors and both were switching at the same time, cat not functioning prope...
October 06, 2005
1994 Buick Park Avenue Ultra 3.8L Poor Fuel Economy, MIL Lamp on VIN: 1G4CU5216R
P1640: qdm 1. ... your a true buick tech. than you know this car is a half breed of obd1 and II. the QDM 1 controles the tcc lock up, the purge, and the boost circuit. the ses light has come on at 10 mph code and hot. come on at 40+mph. What im thinking is the rough idle co...
October 24, 2005