OBD-II code · Chassis
C0579 Brake Booster Temperature Sensor B Circuit Low
Brake booster temperature sensor B signal voltage below expected range. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with C0579?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Booster Temp Sensor B
Related codes
- C05B3Brake Booster Temperature Sensor C Circuit Low
- P25C6Brake Booster Temperature Sensor A Circuit Low
- C0576Brake Pressure Sensor D Circuit High
- C0577Park Brake Force Sensor Circuit Malfunction
- C0578Park Brake Switch Stuck Open
- C057ABrake Booster Temperature Sensor B Circuit High
- C057BBrake Booster Temperature Sensor B Circuit/Open
- C057CBrake Booster Temperature Sensor B Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.