C05CB: The brake pump piston position sensor A circuit voltage is below normal
The brake pump piston position sensor A circuit voltage is below normal. It may be the sensor itself, its connector or the wiring.
| Code | C05CB |
|---|---|
| System | Chassis |
| Group | C05xx, Chassis |
| Type | Generic: it means the same on every make |
How to read and clear C05CB 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 C05CB 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
- C05C7 The brake pressure sensor F gives a higher signal than normal
- C05C8 The brake pressure sensor F has a broken or disconnected wire
- C05C9 The brake pressure sensor power supply has an electrical fault
- C05CA The brake pump piston position sensor A circuit voltage is above normal
- C05CC The brake pump piston position sensor A gives readings outside the normal range
- C05CD The brake pump piston position sensor B circuit voltage is above normal
- C05CE The brake pump piston position sensor B circuit voltage is below normal
- C05CF The brake pump piston position sensor B gives readings outside the normal range
What does code C05CB mean?
The brake pump piston position sensor A circuit voltage is below normal. It may be the sensor itself, its connector or the wiring.
How do you clear C05CB?
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, C05CB 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.
