OBD-II code · Powertrain (generic, extended)
P269D Exhaust Aftertreatment Glow Plug Control Circuit Low
Voltage on the aftertreatment glow plug control line is below the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P269D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to ground
- PossibleRelay coil short
- Less likelyConnector pins corroded - high contact 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
- Best left to a mechanic
- Typical labour
- 0.8–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Aftertreatment Glow Plug, Relay, Wiring Harness
Related codes
- P269AExhaust Aftertreatment Fuel Injector A Circuit High
- P269BExhaust Aftertreatment Glow Plug Control Circuit / Open
- P269CExhaust Aftertreatment Glow Plug Control Performance
- P269EExhaust Aftertreatment Glow Plug Control Circuit High
- P269FExhaust Aftertreatment Glow Plug Circuit / Open
- P26A0Exhaust Aftertreatment Glow Plug Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.