P0C42: The high voltage battery coolant temperature sensor has an electrical fault
The high voltage battery coolant temperature sensor has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P0C42 |
|---|---|
| System | Engine and transmission |
| Group | P0Cxx, Hybrid and electric |
| Type | Generic: it means the same on every make |
How to read and clear P0C42 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 P0C42 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
- P0C3E The DC converter temperature sensor B gives readings outside the normal range
- P0C3F The DC converter temperature sensor B gives a lower signal than normal
- P0C40 The DC converter temperature sensor B gives a higher signal than normal
- P0C41 The DC converter temperature sensor B fails now and then
- P0C43 The high voltage battery coolant temperature sensor gives readings outside the
- P0C44 The high voltage battery coolant temperature sensor gives a lower signal than
- P0C45 The high voltage battery coolant temperature sensor gives a higher signal than
- P0C46 The high voltage battery coolant temperature sensor fails now and then
What does code P0C42 mean?
The high voltage battery coolant temperature sensor has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P0C42?
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, P0C42 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.
