P1638 Diagnostic Trouble Code Discussion for June 2015
TCM Internal - CAN 1 RAM Performance
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| Help Request | Posted | |
| 2001 Chevrolet Express 3500 8.1L MIL Lamp on VIN: 1GBJG31G51 P1638: Generator 'F' Terminal Circuit Malfunction. ... service engine light on and lost of power.it set 2 codes,p1120 and p1638.well I have seen this b4,in the past I found the throttle body and the wire harness to be the problem and it would fix the problem.Well on this one we replaced the wire pig tail,a new... |
June 09, 2015 |
