Powertrain
generic / SAE
P05ED
Reductant Heater Control Module Supply Voltage
The reductant (AdBlue) heater control module - which warms tank, lines and injector to keep AdBlue from freezing - reports its supply voltage outside the calibrated window.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / ED
Possible causes
- Supply voltage low high
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: possible
- Estimated cost: 120–500 €
- Estimated time: 0.6–2 h
- Component: reductant heater control module
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012