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TuningBot DTC Database · v4.37.15

C05BC Brake Booster Motor B Position Sensor Supply Circuit/Open

Generic (OBD-II) interpretation in the TuningBot DTC database.

C · ChassisEngineOBD2

What C05BC means

C05BC
Brake Booster Motor B Position Sensor Supply Circuit/Open Generic · engine Data confidence 65%

The control module detected an interruption (open circuit) in the Brake Booster Motor B Position Sensor Supply circuit, so the expected electrical continuity was not present.

Symptoms

  • Possible reduced power or limp mode
  • MIL illuminated
  • Possible abnormal turbocharger noise

Possible causes

  • Turbocharger actuator or position sensor fault
  • Sticking variable geometry mechanism
  • Charge-air or vacuum leak
  • Wiring or connector fault

Recommended checks

  • Compare specified vs actual boost with live data
  • Check actuator movement over the full range
  • Check hoses and vacuum lines
  • Inspect wiring and connectors

Related and nearby codes

How to read C05BC

C

Chassis: brakes, steering and suspension.

0

Generic SAE-standard code: same meaning on every make.

5BC

Specific fault index within the subsystem.

Frequently asked questions about C05BC

What does C05BC mean?

Brake Booster Motor B Position Sensor Supply Circuit/Open. The control module detected an interruption (open circuit) in the Brake Booster Motor B Position Sensor Supply circuit, so the expected electrical continuity was not present.

Is C05BC generic or manufacturer-specific?

C05BC is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove C05BC at file level?

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether C05BC is removable in your case.

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