C05B3: The brake booster temperature sensor C gives a lower signal than normal
The brake booster temperature sensor C gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | C05B3 |
|---|---|
| System | Chassis |
| Group | C05xx, Chassis |
| Type | Generic: it means the same on every make |
How to read and clear C05B3 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 C05B3 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
- C05AC The combined braking separation valve has got stuck
- C05AE The ABS pump motor calibration needs its learning procedure
- C05AF The brake booster motor B current sensor gives readings outside the normal range
- C05B2 The steering wheel angle and the yaw rate sensor reading do not match each other
- C05B4 The brake booster temperature sensor C gives a higher signal than normal
- C05B5 The brake booster temperature sensor C has a broken or disconnected wire
- C05B6 The brake booster temperature sensor C gives readings outside the normal range
- C05B7 The brake booster temperature sensor C fails now and then
What does code C05B3 mean?
The brake booster temperature sensor C 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 C05B3?
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, C05B3 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.
