Powertrain
generic / SAE
P26A2
Exhaust Aftertreatment Glow Plug Circuit High
The aftertreatment glow plug current is above expected. Internal short reduces resistance. 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 / A2
Possible causes
- Internal short in the glow plug element high
- Supply voltage above specification low
- 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: 120–700 €
- Estimated time: 0.8–3 h
- Component: aftertreatment glow plug
- MIL / check engine light
Sources
References
sae:J2012