Powertrain
generic / SAE
P037D
Glow Plug Sense Circuit
The diagnostic feedback line that monitors glow plug current draw reports a general electrical fault — open, shorted, or out of plausibility. Used to verify each plug actually heats up.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 7D
Possible causes
- Sense circuit failed high
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
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–700 €
- Estimated time: 0.5–3 h
- Component: glow plug
- Component: glow plug control module
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012