Powertrain
generic / SAE
P24E1
NH3 Sensor Circuit
A general circuit fault on the NH3 (ammonia) sensor - measures ammonia slip downstream of the SCR catalyst to detect AdBlue overdose.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / E1
Possible causes
- Open in sensor or wiring high
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 400–1200 €
- Estimated time: 1–3 h
- Component: nh3 sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012