Powertrain
generic / SAE
P037A
Glow Plug/Heater Indicator Control Circuit Low
The driver circuit for the glow plug warning indicator (the dashboard glow lamp) is stuck low — short to ground or stuck-low driver.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 7A
Possible causes
- Short to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
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: 40–300 €
- Estimated time: 0.3–1.5 h
- Component: glow plug indicator
- MIL / check engine light
Sources
References
sae:J2012