P2BC9: The battery charge system positive contactor B control gives a lower signal
The battery charge system positive contactor B control gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | P2BC9 |
|---|---|
| System | Engine and transmission |
| Group | P2Bxx, Engine and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P2BC9 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 P2BC9 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
- P2BC5 The positive battery charge system contactor B has got stuck
- P2BC6 The positive battery charge system contactor B has got stuck
- P2BC7 The battery charge system positive contactor B control has a broken or
- P2BC8 The battery charge system positive contactor B control gives readings outside
- P2BCA The battery charge system positive contactor B control gives a higher signal
- P2BCB The negative battery charge system contactor B has an electrical fault
- P2BCC The negative battery charge system contactor B has got stuck
- P2BCD The negative battery charge system contactor B has got stuck
- P2BAC NOx exceedance: EGR deactivated
What does code P2BC9 mean?
The battery charge system positive contactor B control gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear P2BC9?
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, P2BC9 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.
