Powertrain
generic / SAE
P26A1
Exhaust Aftertreatment Glow Plug Circuit Low
The aftertreatment glow plug current is below expected. Either the element is partially open or supply is undersized.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / A1
Possible causes
- Partial element failure raises resistance high
- Supply voltage drops under load 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: 120–700 €
- Estimated time: 0.8–3 h
- Component: aftertreatment glow plug
- Component: supply circuit
- MIL / check engine light
Sources
References
sae:J2012