Exhaust Aftertreatment Glow Plug Control Performance
The aftertreatment glow plug control responds to commands but the resulting current draw is out of tolerance. Worn glow plug or high-resistance contact.
Affected components
- Aftertreatment glow plug
- Relay
Common causes
- High likelihood: Worn glow plug element raises resistance
- Medium likelihood: Corroded connector at glow plug
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
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.