OBD-II code · Powertrain (generic)
P064C Glow Plug Control Module 1
A general fault is detected on the first glow plug control module - typically a self-diagnosis flag for an internal driver, supply, or watchdog issue.
Is it safe to drive with P064C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule internal fault
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
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Glow Plug Control Module 1
Related codes
- P06F5Glow Plug Control Module 2
- P0649Speed Control Lamp Control Circuit
- P064AFuel Pump Control Module A
- P064BPTO Control Module
- P064DInternal Control Module O2 Sensor Processor Performance Bank 1
- P064EInternal Control Module O2 Sensor Processor Performance Bank 2
- P064FUnauthorized Software or Calibration Detected
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.