Glow Plug Control Module 2 to PCM Communication Circuit
Glow Plug Control Module 2 to PCM Communication Circuit: an electrical fault is present in the circuit. This affects diesel cold-start preheating.
Affected components
- Glow plug control module 2
Common causes
- High likelihood: Open or short on communication wire
- Low likelihood: Gateway module routing CAN messages incorrectly
- Low likelihood: CAN terminating resistor (120 Ω) drifted out of spec
Possible symptoms
- Glow plug warning light on (often orange coil symbol)
- Hard cold start or no start in cold weather
- White smoke from exhaust during warm-up
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.