OBD-II code · Powertrain (generic, extended)
P269B Exhaust Aftertreatment Glow Plug Control Circuit / Open
The control line for the aftertreatment glow plug (used on some diesels to ignite injected HC during DPF regeneration) is open. Active regeneration cannot start.
Is it safe to drive with P269B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen coil in glow plug control relay
- PossibleBroken control wire
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
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Aftertreatment Glow Plug, Control Module, Wiring Harness
Related codes
- P2698Exhaust Aftertreatment Fuel Injector A Performance
- P2699Exhaust Aftertreatment Fuel Injector A Circuit Low
- P269AExhaust Aftertreatment Fuel Injector A Circuit High
- P269CExhaust Aftertreatment Glow Plug Control Performance
- P269DExhaust Aftertreatment Glow Plug Control Circuit Low
- P269EExhaust Aftertreatment Glow Plug Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.