BMW DTC C1242 – Right Rear Wheel Speed Sensor Phase Length Implausible
DTC C1242 meaning on BMW
DTC C1242 on a BMW indicates an issue with the right rear wheel speed sensor phase length being implausible. This means that the signal from the right rear wheel speed sensor is not matching the expected phase length, which can affect the accuracy of the vehicle’s traction control system.
BMW DTC C1242 symptoms
Symptoms of DTC C1242 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Unusual braking behavior, such as pulsating brakes
- Decreased stability while driving
BMW DTC C1242 causes
The common causes of DTC C1242 on a BMW include:
- Faulty right rear wheel speed sensor
- Corroded or damaged sensor wiring
- Poor electrical connection at the sensor
- Issues with the ABS control module
BMW DTC C1242 seriousness
DTC C1242 should be taken seriously as it can affect the vehicle’s traction control system, ABS functionality, and overall stability while driving. Ignoring this issue can compromise the safety and performance of the BMW.
How to diagnose DTC C1242 on BMW
To diagnose DTC C1242 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the vehicle’s ABS system.
- Inspect the right rear wheel speed sensor and its wiring for any visible damage or corrosion.
- Check the electrical connection at the sensor for tightness and cleanliness.
- Perform a visual inspection of the ABS control module for any signs of damage.
How to fix DTC C1242 on BMW
To fix DTC C1242 on a BMW, you can try the following solutions:
- Replace the right rear wheel speed sensor if it is found to be faulty.
- Repair or replace any damaged or corroded sensor wiring.
- Ensure a secure and clean electrical connection at the sensor.
- If necessary, address any issues with the ABS control module.
How to erase DTC C1242 on BMW
To erase DTC C1242 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s ABS system. After performing the necessary repairs and ensuring that the issue has been resolved, you can reset the fault codes to turn off the warning lights on the dashboard.
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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