Hours: 07–23 daily

TuningBot DTC Database · v4.37.15

C056F Brake Booster Travel Sensor Circuit Low

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

C · ChassisEngineOBD2

What C056F means

C056F
Brake Booster Travel Sensor Circuit Low Generic · engine Data confidence 65%

The control module detected that the signal in the Brake Booster Travel circuit stayed below the expected operating range.

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 C056F

C

Chassis: brakes, steering and suspension.

0

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

56F

Specific fault index within the subsystem.

Frequently asked questions about C056F

What does C056F mean?

Brake Booster Travel Sensor Circuit Low. The control module detected that the signal in the Brake Booster Travel circuit stayed below the expected operating range.

Is C056F generic or manufacturer-specific?

C056F is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove C056F 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 C056F is removable in your case.

Other file services

ECU tuningDyno-tested results by model and engine See the results →

← Search the full DTC database