P1637 Diagnostic Trouble Code Discussion for February 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 | |
| 2001 Chevrolet Express 3500 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBHG31R61 P1637: Generator 'L' Terminal Circuit Malfunction. ... P0335, P1637, P1638. I scoped the CKP signal wire at the PCM. Had a square wave signal. Checked power and ground at CKP sensor. Checked out ok. Perform voltage drop test between PCM and CKP... |
February 10, 2010 |
