BMW crash safety module fault codes

The 180 fault codes the crash safety module 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: 5 Series (E60), 5 Series (E61), 6 Series (E63), 6 Series (E64), 7 Series (E65), 7 Series (E66), 7 Series (E67), X5 (E70), X6 (E71), X6 (E72), 1 Series (E81), 1 Series (E82), X1 (E84), Z4 (E85), Z4 (E86), 1 Series (E87), 1 Series (E88), Z4 (E89), 3 Series (E90), 3 Series (E91), 3 Series (E92), 3 Series (E93)

  • 93A8 ACSM: Driver's airbag, stage 1 (and 3 other meanings)
  • 93A9 ACSM: Seat belt tensioner, driver (and 4 other meanings)
  • 93AA ACSM: Seat belt tensioner, passenger (and 4 other meanings)
  • 93AB ACSM: Passenger airbag, stage 1 (and 3 other meanings)
  • 93AC SIM: System time fault (and 5 other meanings)
  • 93AD ACSM: Side airbag, right (and 6 other meanings)
  • 93AE ACSM: Active head restraint, left (and 6 other meanings)
  • 93AF ACSM: Active head restraint, right (and 5 other meanings)
  • 93B0 ACSM: Head airbag, left (and 5 other meanings)
  • 93B1 ACSM: Head airbag, right (and 4 other meanings)
  • 93B2 ACSM: Safety battery terminal (and 4 other meanings)
  • 93B3 ACSM: Passenger airbag, stage 2 (and 4 other meanings)
  • 93B4 ACSM: Driver's airbag, stage 2 (and 4 other meanings)
  • 93B5 ACSM: Seat belt tensioner, rear left (and 5 other meanings)
  • 93B6 ACSM: Seat belt tensioner, rear right (and 5 other meanings)
  • 93B7 ACSM: Anchor-fitting tensioner, driver (and 3 other meanings)
  • 93B8 ACSM: Belt-force limiter, driver (and 5 other meanings)
  • 93B9 ACSM: Belt-force limiter, front passenger (and 4 other meanings)
  • 93BA ACSM: Seat belt-catch contact, driver (and 4 other meanings)
  • 93BB ACSM: Seat belt-catch contact, passenger (and 3 other meanings)
  • 93BC ACSM: Seatbelt-catch contact, rear left (and 5 other meanings)
  • 93BD ACSM: Seatbelt-catch contact, rear right (and 5 other meanings)
  • 93BE MRS: Switch for front passenger airbag deactivation (and 5 other meanings)
  • 93BF MRS: Seat-position sensor, driver (and 5 other meanings)
  • 93C0 MRS: Seat-position sensor, passenger (and 3 other meanings)
  • 93C1 ACSM: Communication fault, seat occupancy detector, passenger (and 5 other meanings)
  • 93C2 ACSM: Seat mat, seat-occupancy detector, passenger, faulty (and 4 other meanings)
  • 93C3 ACSM: Seat occupancy detector, passenger (and 3 other meanings)
  • 93C4 ACSM: Seat occupancy detector, front passenger: internal fault (and 5 other meanings)
  • 93C5 ACSM: Seat occupancy detector, passenger: not released (and 4 other meanings)
  • 93C6 SIM: Control-module fault (error in alarm path) (and 3 other meanings)
  • 93C7 ACSM: Backrest lock for front passenger's seat (and 2 other meanings)
  • 93C8 MRS: Airbag front sensor, left (and 4 other meanings)
  • 93C9 MRS: Airbag front sensor, right (and 4 other meanings)
  • 93CA MRS: Airbag sensor, B-pillar, left (X-direction) (and 4 other meanings)
  • 93CB MRS: Airbag sensor, B-pillar, right (X-direction) (and 4 other meanings)
  • 93CC MRS: Airbag sensor, B-pillar, left (Y-direction) (and 5 other meanings)
  • 93CD MRS: Airbag sensor, B-pillar, right (Y-direction) (and 5 other meanings)
  • 93CE MRS: Airbag sensor, door, front left (and 5 other meanings)
  • 93CF MRS: Airbag sensor, door, front right (and 5 other meanings)
  • 93D0 ACSM: undervoltage (and 4 other meanings)
  • 93D1 ACSM: Over-voltage (and 4 other meanings)
  • 93D2 ACSM: Telltale lamp for front passenger airbag deactivation (and 4 other meanings)
  • 93D3 ACSM: Coding data incorrect (block CRC error during writing coding data) (and 3 other meanings)
  • 93D4 ACSM: Crash telegram stored (and 3 other meanings)
  • 93D5 ACSM: Three crash telegrams stored (and 3 other meanings)
  • 93D6 ACSM: Coding data incorrect (central control unit Control unit is not locked) (and 3 other meanings)
  • 93D7 ACSM: Internal control-module fault (and 4 other meanings)
  • 93D8 ACSM: Seat occupancy detector, front passenger: system could not be released (and 5 other meanings)
  • 93D9 MRS: Airbag front sensor, left: incorrect measuring range (and 5 other meanings)
  • 93DA MRS: Airbag front sensor, left: message implausible (and 3 other meanings)
  • 93DB MRS: Airbag front sensor, right: incorrect measuring range (and 5 other meanings)
  • 93DC MRS: Airbag front sensor, right: message implausible (and 4 other meanings)
  • 93DD MRS: Airbag sensor, B-pillar, left (X-direction): incorrect measuring range (and 4 other meanings)
  • 93DE MRS: Airbag sensor, B-pillar, left (X-direction): message implausible (and 4 other meanings)
  • 93DF MRS: Airbag sensor, B-pillar, right (X-direction): incorrect measuring range (and 5 other meanings)
  • 93E0 MRS: Airbag sensor, B-pillar, right (X-direction): message implausible (and 5 other meanings)
  • 93E1 MRS: Airbag sensor, B-pillar, left (Y-direction): incorrect measuring range (and 4 other meanings)
  • 93E2 MRS: Airbag sensor, B-pillar, left (Y-direction): message implausible (and 4 other meanings)
  • 93E3 MRS: Airbag sensor, B-pillar, right (Y-direction): incorrect measuring range (and 4 other meanings)
  • 93E4 MRS: Airbag sensor, B-pillar, right (Y-direction): message implausible (and 4 other meanings)
  • 93E5 MRS: Airbag sensor, door, front left: incorrect measuring range (and 4 other meanings)
  • 93E6 MRS: Airbag sensor, door, front left: message implausible (and 4 other meanings)
  • 93E7 MRS: Airbag sensor, door, front right: incorrect measuring range (and 3 other meanings)
  • 93E8 MRS: Airbag sensor, door, front right: message implausible (and 4 other meanings)
  • 93E9 ACSM: Airbag telltale lamp (and 3 other meanings)
  • 93EA SGM-SIM: Coding-data fault (data checksum error) (and 1 other meaning)
  • 93EB MRS: TCU output - short circuit to positive (and 4 other meanings)
  • 93EC ACSM: Programming data faulty (and 3 other meanings)
  • 93ED MRS: Control module/sensors: unknown fault (and 3 other meanings)
  • 93EE MRS: Airbag sensor, door, front left: pressure sensor outside measuring range (and 3 other meanings)
  • 93EF MRS: Airbag sensor, door, front left: absolute pressure outside measuring range (and 2 other meanings)
  • 93F0 MRS: Airbag sensor, door, front left: difference of absolute pressure outside measuring range (and 2 other meanings)
  • 93F1 MRS: Airbag sensor, door, front right: pressure sensor outside measuring range (and 3 other meanings)
  • 93F2 MRS: Airbag sensor, door, front right: absolute pressure outside measuring range (and 2 other meanings)
  • 93F3 MRS: Airbag sensor, door, front right: difference of absolute pressure outside measuring range (and 2 other meanings)
  • 93F4 MRS: Airbag sensor, door, front left: communication fault (and 2 other meanings)
  • 93F5 MRS: Airbag sensor, door, front right: communication fault (and 2 other meanings)
  • 93F6 ACSM: Internal control-module fault (triggering threshold reached) (and 2 other meanings)
  • 93F7 ACSM: Knee airbag, front passenger (and 1 other meaning)
  • 93F8 ACSM: Anchor-fitting tensioner, driver (and 1 other meaning)
  • 93F9 ACSM: Active head restraint, driver (and 1 other meaning)
  • 93FA ACSM: Active head restraint, front passenger (and 1 other meaning)
  • 93FB No message (vehicle speed) from DSC, ACSM receiver / MRS5, DSC transmitter (and 4 other meanings)
  • 93FC ACSM: Battery lead, positive (monitoring of shielding) (and 1 other meaning)
  • 93FD ACSM: Battery lead, ground (monitoring of shielding)
  • 93FE ACSM: Rollover-protection controller: not fitted (and 1 other meaning)
  • 93FF ACSM: Rollover-protection controller (and 1 other meaning)
  • 9400 MRS: Incorrect installation, seat-occupancy mat (and 3 other meanings)
  • 9401 ACSM: Rollover-protection controller: communication fault (and 2 other meanings)
  • 9402 ACSM: Rollover-protection controller: internal fault (internal error) (and 2 other meanings)
  • 9403 ACSM: Rollover bar, left (and 2 other meanings)
  • 9404 ACSM: Rollover bar, right (and 1 other meaning)
  • 9405 ACSM: Rollover-protection controller: internal fault (data memory full) (and 1 other meaning)
  • 9406 ACSM: Rollover-protection controller: undervoltage (and 1 other meaning)
  • 9407 ACSM: Rollover-protection controller: internal fault (PDC takes too long) (and 1 other meaning)
  • 9408 ACSM: Undervoltage during self-test (and 2 other meanings)
  • 9409 ACSM: Rollover-protection controller: reset (and 1 other meaning)
  • 940A ACSM: Overvoltage during self-test (and 1 other meaning)
  • 940B ACSM: Rollover-protection controller: sensor (AD converter overdriven)
  • 940C ACSM: Rollover-protection controller: sensor (sensor element not oscillating)
  • 940D No message (brightness LCD), receiver ACSM / MRS5, transmitter KOMBI (and 3 other meanings)
  • 940F SGM-SIM: Electric fuel pump deactivated
  • 9410 ACSM: Anchor-fitting tensioner, front passenger (and 1 other meaning)
  • 9411 ACSM: Safety high-voltage deactivation (and 1 other meaning)
  • 9412 ACSM: Knee airbag, driver (and 2 other meanings)
  • 9413 ACSM: Knee airbag, front passenger (and 2 other meanings)
  • 9414 No message from DSC control unit, ACSM receiver / MRS5, DSC transmitter (CLU2VDA telegram CLU2VDA)
  • 9415 No message from DSC control unit, ACSM receiver / MRS5, DSC transmitter (telegram) (and 1 other meaning)
  • 9416 MRS: Retractor tensioner, left (and 1 other meaning)
  • 9417 MRS: Retractor tensioner, right (and 1 other meaning)
  • 9418 Front passenger airbag adaptive (E84) (and 1 other meaning)
  • 9419 ACSM: Retractor tensioner, driver (and 3 other meanings)
  • 941A ACSM: Retractor tensioner, front passenger (and 3 other meanings)
  • 941B MRS: Knee airbag, left (and 1 other meaning)
  • 941C ACSM: Coding data - coding data incorrect (and 3 other meanings)
  • 941D Spare E88/ ZK15 (and 1 other meaning)
  • 941E Spare E88/ ZK17 (and 1 other meaning)
  • 941F Spare E88/ ZK18 (and 1 other meaning)
  • 9420 SBE_BF - SBE mat passenger does not match the coding (and 2 other meanings)
  • 9421 ACSM: Retractor tensioner, left (and 1 other meaning)
  • 9422 ACSM: Retractor tensioner, right (and 1 other meaning)
  • 9423 ACSM: Adaptive belt-force limiter, left (and 2 other meanings)
  • 9424 ACSM: Adaptive belt-force limiter, right (and 2 other meanings)
  • 9425 Pedestrian-protection system, front left (and 2 other meanings)
  • 9426 Pedestrian-protection system, front right (and 2 other meanings)
  • 9427 Pedestrian-protection system, rear left (and 2 other meanings)
  • 9428 Pedestrian-protection system, rear right (and 1 other meaning)
  • 9429 FGS_SB pedestrian protection sensor timeout vehicle speed at alert
  • 942A Pedestrian protection sensor (optical fiber) - faulty sensor data (dynamic data timeout normal)
  • 942B Pedestrian protection sensor (optical fiber) - faulty sensor data (dynamic data timeout alert) (and 1 other meaning)
  • 942C Pedestrian protection sensor (optical fiber) - faulty sensor data (static data timeout) (and 1 other meaning)
  • 942D Pedestrian protection sensor (optical fiber) - faulty sensor data (temperature timeout) (and 1 other meaning)
  • 942E Pedestrian protection sensor (optical fiber) - faulty sensor data (offset drift) (and 1 other meaning)
  • 942F Pedestrian protection sensor (optical fiber) - faulty sensor data (plausibility dynamic data)
  • 9430 Pedestrian-protection sensor: measurement range implausible (and 1 other meaning)
  • 9431 Pedestrian protection sensor (optical fiber) - faulty sensor data (sensor band sensor data implausible)
  • 9432 Pedestrian-protection sensor (and 1 other meaning)
  • 9433 Pedestrian protection: message, road speed, incorrect (and 2 other meanings)
  • 9434 Front passenger seat occupancy - short circuit or open circuit (and 1 other meaning)
  • 9435 Front passenger seat occupancy - short circuit or open circuit due to moisture (and 1 other meaning)
  • 9436 CIS-Mat - CIS error 3 (and 1 other meaning)
  • 9437 Front passenger seat occupancy - measured values implausible (measured values implausible) (and 1 other meaning)
  • 9438 Front passenger seat occupancy - measured values implausible due to moisture (and 1 other meaning)
  • 9439 CIS-Mat - CIS error 6 (and 1 other meaning)
  • 943A Front passenger seat occupancy - measured values implausible (IQ values outside measurement range) (and 1 other meaning)
  • 943B CIS-mat - CIS error 8 (and 1 other meaning)
  • 943C Seat occupancy detector, passenger - internal hardware fault (and 1 other meaning)
  • 943D Seat occupancy detector, passenger - internal hardware fault due to moisture (and 1 other meaning)
  • 943E Seat occupancy detector, passenger - internal hardware fault (ECU) (and 1 other meaning)
  • 943F Seat occupancy detector, passenger - internal memory fault (and 1 other meaning)
  • 9440 Seat occupancy detection, passenger - coding fault (and 1 other meaning)
  • 9441 Seat occupancy detection, passenger - incorrect installation position (and 1 other meaning)
  • 9442 CIS-Mat - CIS error 15 (and 1 other meaning)
  • 9443 Seat occupancy detection, passenger - overvoltage/undervoltage (and 1 other meaning)
  • 9444 MRS: Battery-lead diagnosis, short circuit to positive
  • 9445 MRS: Battery-lead diagnosis, short circuit to negative
  • 9446 MRS: Battery-lead diagnosis, value too high during self-test
  • 9447 MRS: Battery-lead diagnosis, value too low during self-test
  • 9448 MRS: Battery-lead diagnosis, open circuit, line, during self-test
  • 9449 MRS: Battery-lead diagnosis, implausible value above threshold value
  • 944A MRS: Battery-lead diagnosis, implausible value below threshold value
  • 944B MRS: Battery-lead diagnosis, open circuit
  • 944C MRS: Side airbag, left
  • 944D MRS: Side airbag, right
  • 944E Seat occupancy detection, passenger - component does not correspond to coding (and 1 other meaning)
  • 944F Pedestrian protection system: Crash message stored (and 1 other meaning)
  • 9450 Seat belt force limiter, left
  • 9451 Seat belt force limiter, right
  • 9452 Pedestrian protection sensor (optical fiber) - deviation calculation incorrect (and 1 other meaning)
  • 9453 Pedestrian protection, Safing sensor - incorrect measuring range
  • 9454 Pedestrian protection, Safing sensor - faulty sensor data
  • 9455 Pedestrian protection, Safing sensor
  • 9456 FGS_SB pedestrian protection sensor arming missing
  • 9487 No communication with telephone
  • 9488 SIM: Attack alarm occurred
  • C944 Bus line error - General (and 2 other meanings)
  • C947 Bus Communication Fault (and 1 other meaning)
  • C948 Bus line error - General
  • C94B ACSM: F-CAN communication fault (and 1 other meaning)

Every BMW module's fault codes