P0D78: The air conditioning compressor control unit output driver temperature sensor
The air conditioning compressor control unit output driver temperature sensor gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P0D78 |
|---|---|
| System | Engine and transmission |
| Group | P0Dxx, Hybrid and electric: charging and battery |
| Type | Generic: it means the same on every make |
How to read and clear P0D78 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 P0D78 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
- P0D74 The air conditioning compressor control unit internal temperature sensor fails
- P0D75 The air conditioning compressor control unit output driver temperature sensor
- P0D76 The air conditioning compressor control unit output driver temperature sensor
- P0D77 The air conditioning compressor control unit output driver temperature sensor
- P0D79 The air conditioning compressor control unit output driver temperature sensor
- P0D7A The air conditioning compressor motor phase U current is below normal
- P0D7B The air conditioning compressor motor phase U current is above normal
- P0D7C The air conditioning compressor motor phase V current is below normal
What does code P0D78 mean?
The air conditioning compressor control unit output driver temperature sensor gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
How do you clear P0D78?
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, P0D78 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.
