BMW hybrid brake-actuation changeover fault codes

The 109 fault codes the hybrid brake-actuation changeover can store, and what each one means. Some codes mean different things in different versions of the module; tap a code to see which applies to your car.

On: X6 (E72)

  • 6720 OBD_Code: C0022, brake booster, coil, general fault, electrical
  • 6721 OBD_Code: C0021, brake booster, plausibility
  • 6725 Brake booster sluggish due to low temperature
  • 6726 Brake pressure too low due to low temperature
  • 6730 OBD_Code: C2730, brake booster, diaphragm travel sensor, general electrical fault
  • 6731 OBD_Code: C1021, diaphragm travel sensor: short circuit to voltage supply
  • 6735 OBD_Code: C0048, brake booster, diaphragm travel sensor, signal, plausibility, fault
  • 6736 OBD_Code: C1020, diaphragm travel sensor: signal gradient
  • 6737 Diaphragm travel sensor: Signal faulty (OBDII C1020)
  • 6738 Diaphragm travel sensor: Signal value permanently at zero (OBDII C1020)
  • 6739 Brake system, volume balance faulty
  • 6740 Vacuum in brake servo too low while the vacuum pump and engine are on (OBDII C1003)
  • 6741 Vacuum in brake servo too low - while the vacuum pump is on (OBDII C1003)
  • 6742 Vacuum supply: Leak detected (OBDII C1003) (leakage)
  • 6743 Vacuum supply: Leak detected (OBDII C1003) (gradient)
  • 6744 Low-pressure sensor, signal 1: Electrical fault (OBDII C1030)
  • 6745 Low-pressure sensor, signal 2: Electrical fault (OBDII C1031)
  • 6746 Low-pressure sensor, plausibility (OBDII C1032)
  • 6755 Vacuum pump, running continuously
  • 675A Electric vacuum pump: Voltage on feedback line during initialization too low (OBDII C1040)
  • 675B Electric vacuum pump: Voltage on feedback line during initialization too high (OBDII C1040)
  • 675C Electric vacuum pump: Voltage on feedback line too low (OBDII C1040)
  • 675D Electric vacuum pump: Voltage on feedback line too high (OBDII C1040)
  • 6760 Brake pedal travel sensor: Signal 1 above valid range (OBD code C1067)
  • 6761 Brake pedal travel sensor: Signal 1 below valid range (OBDII C1068)
  • 6770 Brake pedal travel sensor: Signal 2 above valid range (OBDII C1067)
  • 6771 Brake pedal travel sensor: Signal 2 below valid range (OBDII C1068)
  • 6780 Brake pedal travel sensor: Adjustment necessary (OBDII C1069) (zero point error)
  • 6781 Brake pedal travel sensor: Adjustment necessary (OBDII C1069) (calibration data error checksum)
  • 6783 Brake pedal travel sensor: Signals implausible (OBDII C1069)
  • 6790 Shutoff valve, pressure sensor: Electrical fault (OBDII C1050)
  • 6791 Shutoff valve, pressure sensor: Initialization faulty (OBDII C1050)
  • 6792 Shutoff valve, pressure sensor: Unexpected initialization signal detected (OBDII C1050)
  • 6795 Shutoff valve: Electrical fault (OBDII C1051)
  • 6799 Shutoff valve: Monitoring detects fault
  • 679A Shutoff valve: Plausibility (OBDII C1052)
  • 679B Shutoff valve, self-test failed
  • 67A0 Tandem brake master cylinder, pressure sensor 1: General electrical fault (OBDII C1012)
  • 67A1 Tandem brake master cylinder, pressure sensor 1: Signal offset (OBDII C1010)
  • 67A4 Tandem brake master cylinder, pressure sensor 1: Signal plausibility (OBDII C1010)
  • 67A5 Tandem brake master cylinder, pressure sensor 2: General electrical fault (OBDII C1013)
  • 67A6 Tandem brake master cylinder, pressure sensor 2: Signal offset (OBDII C1011)
  • 67A7 Tandem brake master cylinder, pressure sensor 2: Signal plausibility (OBDII C1011)
  • 67A8 Tandem brake master cylinder, pressure: Plausibility (OBDII C1001)
  • 67A9 Leakage or sensor fault in hydraulic circuit
  • 67AA Leakage or sensor fault in hydraulic circuit
  • 67AB Hybrid brake actuation changeover (SBA) control unit, internal: Coolant temperature sensor plausibility
  • 67B0 Brake pedal travel sensor: Short circuit to earth (OBDII C1062)
  • 67B1 Brake pedal travel sensor: Short circuit after battery voltage (OBDII C1063)
  • 67C0 Pressure sensor: Adjustment necessary (OBDII C1016)
  • 67C1 Sensor system, hybrid brake actuation changeover (SBA): Electrical fault (OBDII C103F)
  • 67D2 Sensor system, hybrid brake actuation changeover (SBA): Adjustment necessary (OBDII C1070)
  • 67D3 Brake pedal travel sensor: Adjustment faulty (OBDII C1070)
  • 67D5 Hybrid master control unit (HCP) interface: Signal invalid (OBDII C1071) (brake energy recuperation plausibility)
  • 67D6 Hybrid master control unit (HCP) interface: Signal invalid (OBDII C1071) (HCP interface incorrect or no BUS signal for brake energy recuperation)
  • 67D7 DSC interface: Signal invalid (OBDII C1072) (EHB3 interface signal)
  • 67D8 DSC interface: Signal invalid (OBDII C1072) (EHB3 interface signal)
  • 67D9 DSC interface: Signal invalid (OBDII C1072) (EHB3 interface signal)
  • 67DA DSC interface: Signal invalid (OBDII C1072) (EHB3 interface signal)
  • 67DB DSC interface: Signal invalid (OBDII C1072) (EHB3 interface signal timeout initialization)
  • 67DC Interface DSC
  • 67DD Hybrid brake actuation changeover (SBA) control unit: Vehicle identification number invalid
  • 67DE Sensor system, hybrid brake actuation changeover (SBA): Adjustment necessary (OBDII C1073)
  • 67E0 Hybrid brake actuation changeover (SBA): Undervoltage (OBDII C1080)
  • 67E5 Hybrid brake actuation changeover (SBA): Overvoltage (OBDII C1081)
  • 67E8 Hybrid brake actuation changeover (SBA): Transport mode active (OBDII C1070)
  • 67FA DSC interface: Signal invalid (OBDII C1072) (EHB3 interface signal)
  • 67FB DSC interface: Signal invalid (OBDII C1072) (interface EHB3 Signal)
  • 67FC DSC interface: Signal invalid (OBDII C1072) (interface EHB3 Signal)
  • 67FD DME interface: Signal invalid (OBDII U180E)
  • 67FE DSC interface: Signal invalid (OBDII C1072) (interface EHB3 Signal)
  • 67FF DME interface: Signal invalid (OBDII U180E)
  • 6800 Hybrid brake actuation changeover (SBA) control unit, internal: Hardware fault (OBDII C1082)
  • 6801 Hybrid brake actuation changeover (SBA) control unit, internal (OBDII C1082)
  • CB87 Hybrid brake actuation changeover (SBA): PT-CAN: Communication fault (OBDII U180C)
  • CB8B Hybrid brake actuation changeover (SBA): H-CAN2: Communication fault (OBDII U180D)
  • CB94 No message (replacement EHB3 SBA, 0xE7), SBA receiver, DSC transmitter
  • CB95 Message (exchange DSC SBA, E7) not current, SBA (PT-CAN) receiver, DSC (PT-CAN) transmitter
  • CB96 Message (exchange DSC SBA, E7) checksum not correct, SBA (PT-CAN) receiver, DSC (PT-CAN) transmitter
  • CB97 No message (speed, 0x1A0), SBA receiver, DSC transmitter
  • CB98 Message (speed PT-CAN, 1A0) not current, receiver SBA (PT-CAN), transmitter DSC (PT-CAN)
  • CB99 Message (speed PT-CAN, 1A0) checksum wrong, receiver SBA (PT-CAN), transmitter DSC (PT-CAN)
  • CB9A No message (wheel speed, 0xCE), SBA receiver, DSC transmitter
  • CB9D No message (DSC status, 0x19E), SBA receiver, DSC transmitter
  • CB9E Message (status DSC PT-CAN,19E ) not current, receiver SBA (PT-CAN), transmitter DSC (PT-CAN)
  • CB9F Message (status DSC PT-CAN,19E ) checksum wrong, receiver SBA (PT-CAN), transmitter DSC (PT-CAN)
  • CBA0 No message (ambient temperature/relative time, 0x310), SBA receiver, instrument panel transmitter
  • CBA1 No message (kilometer reading/range, 0x330), SBA receiver, instrument panel transmitter
  • CBA2 No message (terminal status, 0x130), SBA receiver, CAS transmitter
  • CBA3 Message (terminal status, 130) not current, receiver SBA (PT-CAN), transmitter CAS (K-CAN)
  • CBA4 Message (terminal status, 130) checksum wrong, receiver SBA (PT-CAN), transmitter CAS (K-CAN)
  • CBA8 No message (transmission data, 0xBA), receiver SBA, transmitter EGS/HIM
  • CBA9 Message (transmission data, accelerator sensor) not current, receiver HIM (PT-CAN), transmitter HIM (PT-CAN)
  • CBAA Message (transmission data, accelerator sensor) checksum wrong, receiver HIM (PT-CAN), transmitter HIM (PT-CAN)
  • CBAB No message (torque 3, 0xAA), receiver SBA, transmitter DME-DDE
  • CBAC Message (torque 3 PT-CAN, AA) not current, receiver SBA (PT-CAN), transmitter DME (PT-CAN)
  • CBAD Message (torque 3 PT-CAN, AA) checksum wrong, receiver SBA (PT-CAN), transmitter DME (PT-CAN)
  • CBAE No message (vehicle identification number, 0x380), SBA receiver, CAS transmitter
  • CBAF No message (wheel torque, drive 5, 0xDD), receiver SBA, transmitter DME-DDE
  • CBB0 Message (wheel torque drive 5, Dynamic Drive) not current, receiver SBA (PT-CAN), transmitter DME (PT-CAN)
  • CBB1 Message (wheel torque drive 5, Dynamic Drive) checksum wrong, receiver SBA (PT-CAN), transmitter DME (PT-CAN)
  • CBB8 No message (overrun time, power supply, 0x3BE), SBA receiver, CAS transmitter
  • CBBA No message (acceleration data, 0x2B3), SBA receiver, DSC transmitter
  • CBBB Message (acceleration data, 2B3) not current, receiver SBA (PT-CAN), transmitter DSC (PT-CAN)
  • CBBC Message (acceleration data, 2B3) checksum wrong, receiver SBA (PT-CAN), transmitter DSC (PT-CAN)
  • CBC0 No message (regenerative braking status, 1C6), receiver SBA (H-CAN2), transmitter HCP (H-CAN2)
  • CBC1 Message (regenerative braking status, 1C6) not current, receiver SBA (H-CAN2), transmitter HCP (H-CAN2)
  • CBC2 Message (regenerative braking status, 1C6) checksum wrong, receiver SBA (H-CAN2), transmitter HCP (H-CAN2)
  • CBC3 No message (PPEI Engine General Status 4 HS, 4C1), receiver SBA (H-CAN2), transmitter HIM (H-CAN2)

Every BMW module's fault codes