P24E4: The ammonia sensor gives a higher signal than normal
The ammonia sensor gives a higher signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P24E4 |
|---|---|
| System | Engine and transmission |
| Group | P24xx, EGR, EVAP and particulate filter |
| Type | Generic: it means the same on every make |
How to read and clear P24E4 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P24E4 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P24E0 The AdBlue purge control valve B has got stuck
- P24E1 The ammonia sensor has an electrical fault
- P24E2 The ammonia sensor gives readings outside the normal range
- P24E3 The ammonia sensor gives a lower signal than normal
- P24E5 The ammonia sensor fails now and then
- P24E6 The ammonia sensor heater has a broken or disconnected wire
- P24E7 The ammonia sensor heater gives a lower signal than normal
- P24E8 The ammonia sensor heater gives a higher signal than normal
- P2400 EVAP leak detection pump control circuit open or faulty
- P2413 Exhaust gas recirculation (EGR) system performance
- P2414 O2 sensor exhaust sample error (bank 1, sensor 1)
- P2425 EGR cooler valve control circuit open or faulty
What does code P24E4 mean?
The ammonia sensor gives a higher signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
How do you clear P24E4?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P24E4 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
