Powertrain
generic / SAE
P2AD0
Reductant Temperature Sensor B Circuit Intermittent/Erratic
The reductant temperature B sensor signal drops out or jumps intermittently. Loose connector or noisy ground.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / D0
Possible causes
- Sensor connector not seated high
- Noisy ground reference medium
- Connector with intermittent contact under vibration 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: easy
- DIY: possible
- Estimated cost: 50–250 €
- Estimated time: 0.3–1.5 h
- Component: reductant temperature sensor b
- Component: wiring harness
- Component: ecm
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012