P Codes – OBD2 Powertrain Codes

Learn all about the P068B code, what causes ECM/PCM power relay de-energized performance issues, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P068C code, what causes cylinder 7 glow plug control circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P068D code, what causes cylinder 7 glow plug control circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P068E code, what causes cylinder 8 glow plug control circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P068F code, what causes cylinder 8 glow plug control circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0690 code, what causes ECM/PCM power relay sense circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0691 code, what causes Fan 1 Control Circuit Low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0692 code, what causes Fan 1 Control Circuit High, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0693 code, what causes Fan 2 Control Circuit Low, and how to diagnose and fix common issues to maintain optimal engine performance.

Learn all about the P0694 code, what causes Fan 2 control circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.