Powertrain
generic / SAE
P241E
Reductant Heater Coolant Control Valve Stuck Closed
The valve that routes engine coolant to heat the AdBlue lines is stuck closed - AdBlue lines do not warm up and may freeze in cold weather, blocking dosing.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 1E
Possible causes
- Valve stuck closed high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–800 €
- Estimated time: 1–3 h
- Component: reductant coolant control valve
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012