Glow Plug/Heater Circuit B
A general electrical fault on glow-plug heater circuit B — typically the second bank of glow plugs on an inline-6 or V-engine.
Affected components
- Glow plug
- Glow plug control module
Common causes
- High likelihood: Glow plug or harness failed
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
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.