C122E – BMW DTC

BMW DTC C122E – Right Front Wheel Speed Sensor

DTC C122E meaning on BMW

DTC C122E on a BMW indicates a fault with the Right Front Wheel Speed Sensor. This diagnostic trouble code (DTC) is specific to the right front wheel speed sensor and is triggered when the sensor detects an issue with the wheel speed signal.

BMW DTC C122E symptoms

Symptoms of DTC C122E on a BMW may include:

• ABS warning light illuminated on the dashboard
• Traction control system malfunction
• Loss of stability control
• Increased stopping distance during braking

BMW DTC C122E causes

Common causes of DTC C122E on a BMW include:

• Failed or malfunctioning right front wheel speed sensor
• Damaged wiring or connectors leading to the sensor
• Corrosion or debris affecting the sensor’s performance

BMW DTC C122E seriousness

DTC C122E should be taken seriously as it can affect the proper functioning of the vehicle’s ABS and stability control systems. Driving with this fault unresolved may compromise the safety and handling of the vehicle, especially during emergency braking or slippery road conditions.

How to diagnose DTC C122E on BMW

To diagnose DTC C122E on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes from the vehicle’s ABS system.
2. Inspect the right front wheel speed sensor for any visible damage or contamination.
3. Check the wiring and connectors leading to the sensor for any signs of wear, corrosion, or disconnection.
4. Perform a wheel speed sensor test using a multimeter to check for proper resistance and signal output.

How to fix DTC C122E on BMW

To fix DTC C122E on a BMW, you can try the following solutions:

1. Replace the right front wheel speed sensor if it is found to be faulty.
2. Repair or replace any damaged wiring or connectors leading to the sensor.
3. Clean the sensor and its mounting area from any debris or corrosion that may be affecting its performance.
4. Clear the fault codes using a diagnostic scanner after the repair is completed.

How to erase DTC C122E on BMW

To erase DTC C122E on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s ABS system. Follow these steps:

1. Connect the diagnostic scanner to the vehicle’s OBD-II port.
2. Select the ABS system from the scanner’s menu and navigate to the option to clear fault codes.
3. Follow the on-screen instructions to erase the DTC C122E code from the system.
4. Once the fault codes are cleared, perform a test drive to ensure the issue has been resolved.

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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