P0AA7: The hybrid battery voltage insulation sensor has an electrical fault
The hybrid battery voltage insulation sensor has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P0AA7 |
|---|---|
| System | Engine and transmission |
| Group | P0Axx, Hybrid and electric |
| Type | Generic: it means the same on every make |
How to read and clear P0AA7 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 P0AA7 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
- P0AA3 The negative hybrid battery contactor has an electrical fault
- P0AA4 The hybrid battery negative contactor circuit has got stuck
- P0AA5 The hybrid battery negative contactor circuit has got stuck
- P0AA6 Hybrid high-voltage system isolation fault
- P0AA8 The hybrid battery voltage insulation sensor gives readings outside the normal
- P0AA9 The hybrid battery voltage insulation sensor gives a lower signal than normal
- P0AAA The hybrid battery voltage insulation sensor gives a higher signal than normal
- P0AAB The hybrid battery voltage insulation sensor fails now and then
- P0A0F Engine failed to start
- P0A1F Battery energy control module fault
- P0A7F Hybrid battery pack deterioration
- P0A80 Replace hybrid battery pack
What does code P0AA7 mean?
The hybrid battery voltage insulation sensor has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P0AA7?
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, P0AA7 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.
