Powertrain
Definition only
Lights the check engine lamp
P208A: Reductant Pump A Control Circuit/Open
Standardized SAE J2012 code · P20xx — Fuel & air metering and auxiliary emission controls
What does P208A mean?
The control line driving DEF pump A is open — no continuity through the motor or harness, dosing pressure cannot be built.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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)
Common causes
- High Pump motor winding open
- Medium Open wire to pump
- Low Pin pushed back out of connector body
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P208A on the same make and model first.
P208A in the community
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