Powertrain
generic / SAE
P2046
Reductant Temperature Sensor A Circuit Intermittent
Reductant temperature sensor A signal jumps or drops out intermittently — connector or harness fault.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 46
Possible causes
- Intermittent connector high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component 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: 60–450 €
- Estimated time: 0.5–2 h
- Component: reductant temperature sensor
- Component: reductant temperature connector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012