Cylinder 3 Glow Plug Control Circuit High
The control line for the glow plug on cylinder 3 is open or shorted to supply - the plug cannot be heated.
Affected components
- Glow plug cyl 3
Common causes
- High likelihood: Open in plug or wiring
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Supply wire pinched against B+ source
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.