C1237 Code - Speed Wheel Rear Input Signal Missing
Quick Answer
The C1237 diagnostic trouble code indicates that the rear speed wheel input signal is missing. Common causes include Faulty rear wheel speed sensor, Damaged wiring or connectors leading to the rear wheel speed sensor, Corrosion or debris interfering with the sensor's operation. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C1237 indicates Speed Wheel Rear Input Signal Missing.
- Common causes
- Common causes include Faulty rear wheel speed sensor, Damaged wiring or connectors leading to the rear wheel speed sensor, Corrosion or debris interfering with the sensor's operation.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code C1237 Description
The C1237 diagnostic trouble code indicates that the rear speed wheel input signal is missing. This means that the vehicle's system is not receiving the necessary data from the rear wheel speed sensor, which can lead to issues with the vehicle's stability control system. The rear wheel speed sensor is crucial for providing accurate information on the speed of the wheels, allowing the vehicle's system to adjust braking and traction control as needed. Without this input signal, the vehicle may experience difficulties in maintaining stability and controlling wheel slip.
Common Causes of C1237
- Faulty rear wheel speed sensor
- Damaged wiring or connectors leading to the rear wheel speed sensor
- Corrosion or debris interfering with the sensor's operation
- Electronic control module (ECM) failure
- Issues with the vehicle's powertrain control module (PCM)
Symptoms of C1237
- ABS (Anti-lock Braking System) warning light illuminated on the dashboard
- Traction control system engaging unexpectedly
- Erratic behavior in the vehicle's stability control
- Loss of traction on slippery roads
- Increased stopping distance during braking
How to Fix C1237
- Inspect the rear wheel speed sensor for any damage or corrosion.
- Check the wiring and connectors leading to the sensor for any breaks or loose connections.
- Clean any debris or contaminants that may be obstructing the sensor's operation.
- Replace the rear wheel speed sensor if it is found to be faulty.
- Clear the diagnostic trouble code and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix C1237
The typical repair cost for addressing a C1237 diagnostic trouble code can range from $100 to $300, depending on the specific cause of the issue and the labor rates at the auto repair shop. It's important to note that additional costs may be incurred if the sensor needs to be replaced or if there are other underlying issues contributing to the problem. As labor rates can vary, it's recommended to check with local auto repair shops for a more accurate estimate based on your vehicle make and model.
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Code C1237 Information for Specific Makes
- C1237 Ford — Speed Wheel Rear Input Signal Missing
- C1237 Lexus — Speed Sensor Rotor Faulty
- C1237 Lincoln — Speed Wheel Rear Input Signal Missing
- C1237 Mercury — Speed Wheel Rear Input Signal Missing
- C1237 Scion — Speed Sensor Rotor Faulty
- C1237 Toyota — Speed Sensor Rotor Faulty
Frequently Asked Questions about C1237 Code
1. What are the common symptoms of OBDII code C1237 (Speed Wheel Rear Input Signal Missing)?
The common symptoms include the ABS warning light illuminating on the dashboard, traction control system malfunctions, and potential loss of stability control.
2. What are the possible causes of OBDII code C1237?
Possible causes of this code include a faulty rear wheel speed sensor, damaged wiring or connectors in the rear wheel speed sensor circuit, a malfunctioning ABS module, or issues with the vehicle's electronic stability control system.
3. How can I diagnose the source of OBDII code C1237?
Diagnosing this code typically involves using a diagnostic scan tool to retrieve the specific trouble code, inspecting the rear wheel speed sensor and its wiring for damage or corrosion, and testing the sensor's output using a multimeter.
4. Can I still drive my vehicle with OBDII code C1237 present?
While it may be possible to drive the vehicle with this code, it is not recommended as it can affect the proper functioning of the ABS and stability control systems, potentially compromising safety.
5. How can I repair OBDII code C1237?
Repairing this code often involves replacing the faulty rear wheel speed sensor, repairing any damaged wiring or connectors, resetting the trouble code with a scan tool, and testing the system to ensure proper functionality.
6. Are there any DIY tips for fixing OBDII code C1237?
DIY tips for addressing this code include checking and cleaning the rear wheel speed sensor connections, inspecting the sensor for any visible damage, and ensuring all related components are securely connected.
7. How urgent is it to address OBDII code C1237?
It is recommended to address this code as soon as possible to prevent potential safety hazards and further damage to the vehicle's ABS and stability control systems.
8. Can weather conditions affect the occurrence of OBDII code C1237?
Yes, extreme weather conditions like heavy rain or snow can sometimes lead to issues with the rear wheel speed sensor, triggering OBDII code C1237.
9. Is it common for multiple wheel speed sensors to fail simultaneously and trigger code C1237?
While rare, it is possible for multiple wheel speed sensors to fail simultaneously due to shared wiring or electrical issues, resulting in the occurrence of OBDII code C1237.
10. Will disconnecting the battery reset OBDII code C1237?
Disconnecting the battery may temporarily clear the trouble code, but it is recommended to address the underlying issue causing the code to prevent it from reoccurring.
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