OBD-II code · Powertrain (generic, extended)
P2EAD Reductant Metering Unit 2 Performance
The reductant metering unit 2 does not deliver the expected DEF/AdBlue dosing within the calibrated profile. Pump aging or pressure regulator drift.
Is it safe to drive with P2EAD?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyPump output degraded
- PossiblePressure regulator drifted
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)
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Reductant Metering Unit 2
Related codes
- P20FEReductant Metering Unit 1 Performance
- P2EAAActive Radiator Air Flow Control Module A Control Circuit Performance
- P2EABActive Radiator Air Flow Control Module A Over Temperature
- P2EACActive Radiator Air Flow Control Module A Performance
- P2EAEReductant Injection Valve Circuit Range/Performance Bank 1 Unit 2
- P2EAFReductant Injection Valve Stuck Closed Bank 1 Unit 2
- P2EB0Throttle Valve Intake Air Pressure Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.