Powertrain
generic / SAE
P05F6
Exhaust Aftertreatment Power Relay Control Circuit Stuck On
The aftertreatment power relay is stuck on - aftertreatment electronics stay powered after key-off, draining the battery.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / F6
Possible causes
- Relay welded closed high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.5–1.8 h
- Component: aftertreatment power relay
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012