Powertrain
generic / SAE
P208A
Reductant Pump A Control Circuit/Open
The control line driving DEF pump A is open — no continuity through the motor or harness, dosing pressure cannot be built.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 8A
Possible causes
- Pump motor winding open high
- Open wire to pump medium
- Pin pushed back out of connector body 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: 150–1100 €
- Estimated time: 1–3.5 h
- Component: reductant pump
- Component: reductant pump relay
- Component: reductant supply harness
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012