Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / 9D
Possible causes
- Control wire shorted to ground high
- Relay coil short medium
- Connector pins corroded - high contact resistance 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: shop recommended
- Estimated cost: 100–600 €
- Estimated time: 0.8–2.5 h
- Component: aftertreatment glow plug
- Component: relay
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012