BMW DTC C122A – Right Front Wheel Speed Sensor Circuit Electrical
DTC C122A meaning on BMW
DTC C122A on a BMW indicates an issue with the Right Front Wheel Speed Sensor Circuit Electrical. This fault code is triggered when the vehicle’s onboard diagnostic system detects a problem with the electrical circuit related to the right front wheel speed sensor.
BMW DTC C122A symptoms
Symptoms of DTC C122A on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Loss of stability control
- Erratic speedometer readings
BMW DTC C122A causes
Common causes of DTC C122A on a BMW include:
- Faulty wheel speed sensor
- Damaged wiring or connectors in the circuit
- Corrosion or contamination at the sensor connection
- Electronic control module (ECM) issues
BMW DTC C122A seriousness
DTC C122A should be addressed promptly as it can affect the proper functioning of the vehicle’s ABS and traction control systems. Ignoring this fault code may compromise the safety and stability of the vehicle, especially during braking and cornering maneuvers.
How to diagnose DTC C122A on BMW
To diagnose DTC C122A on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault code and related data.
- Inspect the right front wheel speed sensor for damage or contamination.
- Check the wiring and connectors for any signs of wear, corrosion, or loose connections.
- Perform a visual inspection of the sensor circuit for any visible issues.
- Test the sensor’s resistance and output signal using a multimeter.
How to fix DTC C122A on BMW
To fix DTC C122A on a BMW, consider the following steps:
- Replace the right front wheel speed sensor if it is faulty.
- Repair or replace any damaged wiring or connectors in the circuit.
- Clean the sensor connection to remove any corrosion or contamination.
- Reset the fault code using a diagnostic scanner after completing the repairs.
How to erase DTC C122A on BMW
To erase DTC C122A on a BMW, follow these steps:
- Connect a diagnostic scanner to the vehicle’s OBD-II port.
- Select the option to clear fault codes from the ECM.
- Follow the on-screen prompts to erase the DTC C122A code.
- Verify that the fault code has been successfully cleared by rescanning the system.
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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