BMW DTC C058C – Brake Booster Motor ‘B’ Position Sensor Circuit Low
DTC C058C meaning on BMW
DTC C058C on a BMW refers to the Brake Booster Motor ‘B’ Position Sensor Circuit Low. This diagnostic trouble code indicates that there is a low voltage condition detected in the circuit related to the brake booster motor position sensor ‘B’.
BMW DTC C058C symptoms
Symptoms of DTC C058C on a BMW may include:
- Check Engine Light (MIL) illuminated
- Brake system warning light may be on
- Decreased brake assist functionality
- Reduced braking performance
BMW DTC C058C causes
Possible causes of DTC C058C on a BMW include:
- Faulty brake booster motor ‘B’ position sensor
- Wiring or connector issues in the sensor circuit
- Low voltage supply to the sensor
- Electronic control module (ECM) malfunction
BMW DTC C058C seriousness
DTC C058C should be addressed promptly as it can affect the proper functioning of the brake booster system, potentially leading to reduced braking performance and compromised safety. It is recommended to diagnose and repair this issue as soon as possible.
How to diagnose DTC C058C on BMW
To diagnose DTC C058C on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and identify the specific code C058C.
- Inspect the brake booster motor ‘B’ position sensor and its wiring for any visible damage or corrosion.
- Check the voltage supply to the sensor and ensure it is within the specified range.
- Perform a continuity test on the sensor circuit to check for any open or short circuits.
- Inspect the electronic control module (ECM) for any signs of malfunction.
How to fix DTC C058C on BMW
To fix DTC C058C on a BMW, the following steps may be taken:
- Replace the faulty brake booster motor ‘B’ position sensor if it is found to be defective.
- Repair any damaged wiring or connectors in the sensor circuit.
- Ensure the voltage supply to the sensor is correct and stable.
- If the ECM is faulty, it may need to be repaired or replaced.
How to erase DTC C058C on BMW
To erase DTC C058C on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made to address the underlying issue causing the fault code, the scanner can be used to clear the code from the vehicle’s memory. This will reset the Check Engine Light and any associated warning lights.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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