P0A21: The engine torque sensor fails now and then
The engine torque sensor fails now and then. It is usually the part, its wiring or a connector with poor contact.
| Code | P0A21 |
|---|---|
| System | Engine and transmission |
| Group | P0Axx, Hybrid and electric |
| Type | Generic: it means the same on every make |
How to read and clear P0A21 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 P0A21 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
- P0A1D There is a fault in the control unit for the hybrid powertrain
- P0A1E There is a fault in the starter and generator control unit
- P0A1F Battery energy control module fault
- P0A20 The engine torque sensor gives a higher signal than normal
- P0A22 The generator torque sensor has an electrical fault
- P0A23 The generator torque sensor gives readings outside the normal range
- P0A24 The generator torque sensor gives a lower signal than normal
- P0A25 The generator torque sensor gives a higher signal than normal
- P0A0F Engine failed to start
- P0A7F Hybrid battery pack deterioration
- P0A80 Replace hybrid battery pack
- P0A94 DC/DC converter performance
What does code P0A21 mean?
The engine torque sensor fails now and then. It is usually the part, its wiring or a connector with poor contact.
How do you clear P0A21?
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, P0A21 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.
