Powertrain
generic / SAE
P223A
Reductant Heater E Control Circuit
A general electrical fault on the DEF heater E control circuit. On heavy-duty trucks the DEF system can have multiple heaters along the supply path; E is the fifth.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 3A
Possible causes
- Heater winding or wiring fault 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: shop recommended
- Estimated cost: 80–800 €
- Estimated time: 0.7–3 h
- Component: reductant line heater e
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012