OBD-II code · Powertrain (generic)
P052F Glow Plug Control Module 1 System Voltage
Glow Plug Control Module 1 System Voltage: the control module has detected this fault condition. This affects diesel cold-start preheating.
Is it safe to drive with P052F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply voltage low
- PossibleSupply relay contact high resistance
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Likely to fail
- Parts involved
- Glow Plug Control Module 1, Glow Plug Supply Relay
Related codes
- P06F9Glow Plug Control Module 2 System Voltage
- P052CCold Start A Camshaft Position Timing Over-Advanced Bank 2
- P052DCold Start A Camshaft Position Timing Over-Retarded Bank 2
- P052EPCV Regulator Valve Performance
- P0530A/C Refrigerant Pressure Sensor "A" Circuit
- P0531A/C Refrigerant Pressure Sensor Range/Performance
- P0532A/C Refrigerant Pressure Sensor "A" Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.