Join Now
International Automotive Technicians Network

P1637 Diagnostic Trouble Code Discussion for April 2010

Generator 'L' Terminal Circuit Malfunction


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P1637
Help Request Posted
2002 BMW 540i 4.4L Poor Idle Quality, Surge, MIL Lamp on VIN: WBADN534X2
P1637: Throttle Valve Actuator. ... / Limp Mode and MIL on with codes P1637 and P0021. The car has a new MAS and Throttle Body. I reset adaptaions and that did nothing. So I did a hard reset, cleared adaptations and codes and started the car. It ran great, even under load. I let it idle for ...
April 09, 2010
2002 BMW 540i 4.4L Poor Idle Quality, Surge, MIL Lamp on VIN: WBADN534X2
P1637: Throttle Valve Actuator. ... / Limp Mode and MIL on with codes P1637 and P0021. The car has a new MAS and Throttle Body. I reset adaptaions and that did nothing. So I did a hard reset, cleared adaptations and codes and started the car. It ran great, even under load. I let it idle for ...
April 16, 2010
2002 BMW 540i 4.4L Poor Idle Quality, Surge, MIL Lamp on VIN: WBADN534X2
P1637: Throttle Valve Actuator. ... / Limp Mode and MIL on with codes P1637 and P0021. The car has a new MAS and Throttle Body. I reset adaptaions and that did nothing. So I did a hard reset, cleared adaptations and codes and started the car. It ran great, even under load. I let it idle for ...
April 09, 2010
2002 BMW 540i 4.4L Poor Idle Quality, Surge, MIL Lamp on VIN: WBADN534X2
P1637: Throttle Valve Actuator. ... / Limp Mode and MIL on with codes P1637 and P0021. The car has a new MAS and Throttle Body. I reset adaptaions and that did nothing. So I did a hard reset, cleared adaptations and codes and started the car. It ran great, even under load. I let it idle for ...
April 16, 2010