C1237 Mercury Code - Speed Wheel Rear Input Signal Missing
Quick Answer
The C1237 diagnostic trouble code (DTC) for Mercury vehicles indicates that the speed wheel rear input signal is missing. Common causes include Faulty rear wheel speed sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting sensor performance. 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 Mercury indicates Speed Wheel Rear Input Signal Missing.
- Common causes
- Common causes include Faulty rear wheel speed sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting sensor performance.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code C1237 Mercury Description
The C1237 diagnostic trouble code (DTC) for Mercury vehicles indicates that the speed wheel rear input signal is missing. This means that the vehicle's onboard computer system is not receiving the necessary data from the rear wheel speed sensor. The rear wheel speed sensor is responsible for monitoring the speed of the wheels and sending this information to the vehicle's electronic control module (ECM) to assist in various functions such as traction control, stability control, and anti-lock braking systems.
Common Causes of C1237 Mercury
- Faulty rear wheel speed sensor
- Damaged wiring or connectors in the sensor circuit
- Corrosion or debris affecting sensor performance
- ECM software or hardware issues
- Mechanical damage to the rear wheel speed sensor
Symptoms of C1237 Mercury
- ABS warning light illuminated on the dashboard
- Traction control system malfunction
- Loss of stability control during driving
- Increased stopping distance when braking
- Unusual noises coming from the rear wheels
How to Fix C1237 Mercury
- Begin by conducting a thorough inspection of the rear wheel speed sensor, wiring, and connectors for any visible damage or corrosion.
- Test the rear wheel speed sensor using a multimeter to check for proper resistance and signal output.
- Replace the rear wheel speed sensor if it is found to be faulty or damaged.
- Clear the DTC from the vehicle's ECM memory using a diagnostic scan tool.
- Test drive the vehicle to ensure that the ABS, traction control, and stability control systems are functioning properly.
Cost to Fix C1237 Mercury
The typical repair costs for addressing a C1237 code on a Mercury vehicle can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the cost of replacing a rear wheel speed sensor can range from $100 to $300, including parts and labor. Additional costs may apply if there are wiring or connector issues that need to be addressed. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle model.
Tech Notes for C1237 Mercury
2002-2004 Mercury Mountaineer Factory Service Bulletin OBDII Code C1237
Need more information about the C1237 Mercury code?
Need more information on how to fix the C1237 Mercury code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C1237 Mercury code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C1237 Mercury Code
1. What does the OBDII code C1237 mean on a Mercury vehicle?
The C1237 code indicates that the rear wheel speed sensor input signal is missing or not being detected by the ABS module.
2. What are the common symptoms of the C1237 code in a Mercury?
Symptoms may include the ABS warning light being illuminated, loss of ABS functionality, and potential issues with traction control.
3. What causes the C1237 code to appear?
Common causes include a faulty rear wheel speed sensor, damaged wiring or connectors, debris obstructing the sensor, or a malfunctioning ABS module.
4. Can I still drive my Mercury with the C1237 code?
Yes, you can drive the vehicle, but ABS and traction control features may not function properly, increasing the risk of skidding or reduced braking performance in certain conditions.
5. How do I diagnose the C1237 code on my Mercury?
Diagnosis typically involves scanning for codes with an OBDII tool, visually inspecting the rear wheel speed sensor and wiring, and testing the sensor with a multimeter.
6. How do I fix the C1237 code on my Mercury?
Repairs may include replacing the faulty rear wheel speed sensor, repairing or replacing damaged wiring or connectors, and cleaning debris from the sensor and wheel hub.
7. How much does it cost to repair the C1237 code on a Mercury?
The cost can vary but typically ranges from $100 to $300, depending on whether the sensor, wiring, or ABS module needs repair or replacement.
8. Can a dirty wheel hub cause the C1237 code?
Yes, dirt, rust, or debris around the wheel hub can interfere with the rear wheel speed sensor’s ability to detect wheel movement, triggering the code.
9. How do I prevent the C1237 code from returning?
Regularly inspect and clean the wheel hubs, ensure the wheel speed sensors are free of damage, and address ABS-related issues promptly to prevent recurring problems.
10. Will clearing the C1237 code fix the problem?
Clearing the code will turn off the warning light temporarily, but if the underlying issue isn’t resolved, the code and symptoms will return.
Discuss the causes and fixes for C1237 Mercury OBDII Code
Code C1237 Mercury comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.