C1175 Mercury Code - Left Rear Wheel Speed Sensor Input Circuit Failure
Quick Answer
The ABS module receives wheel speed readings from each wheel speed sensor and processes this information to determine if an ABS event is necessary. Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear Wheel Speed Sensor circuit poor electrical connection. 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
- C1175 Mercury indicates Left Rear Wheel Speed Sensor Input Circuit Failure.
- Common causes
- Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear Wheel Speed Sensor circuit poor electrical connection.
- 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.
Code C1175 Mercury Description
The active wheel speed sensor generates a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry to determine if they are functional.
The ABS module continuously monitors and compares the rotational speed of each wheel and when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper. This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS module returns the solenoid valves to their normal position and normal (base) braking resumes.
What are the Possible Causes of the DTC C1175 Mercury?
- Faulty Left Rear Wheel Speed Sensor
- Left Rear Wheel Speed Sensor harness is open or shorted
- Left Rear Wheel Speed Sensor circuit poor electrical connection
How to Fix the DTC C1175 Mercury?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1175 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C1175 Mercury Code
1. What does the OBDII code C1175 mean for a Mercury vehicle?
C1175 indicates a Left Rear Wheel Speed Sensor Input Circuit Failure, meaning the vehicle's ABS module is not receiving a proper signal from the left rear wheel speed sensor.
2. What are common symptoms of the C1175 code?
Common symptoms include the ABS warning light or traction control light being illuminated, erratic ABS operation, reduced braking performance, or the speedometer functioning improperly.
3. What causes the C1175 code to be triggered?
This code can be caused by a faulty left rear wheel speed sensor, damaged wiring or connectors, a dirty or damaged tone ring, or a malfunctioning ABS module.
4. How can I diagnose the C1175 code?
Start by visually inspecting the left rear wheel speed sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to test the sensor's resistance and check for proper voltage at the connector.
5. Can a dirty tone ring cause the C1175 code?
Yes, a dirty or damaged tone ring can prevent the wheel speed sensor from reading accurately, which can trigger the C1175 code.
6. Is it safe to drive with the C1175 code active?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, which can compromise safety, especially in slippery conditions.
7. How do I fix the C1175 code on a Mercury vehicle?
Repairs may include cleaning or replacing the left rear wheel speed sensor, repairing or replacing damaged wiring or connectors, or replacing a faulty tone ring or ABS module.
8. How much does it cost to repair the C1175 code?
The cost varies depending on the exact issue, but replacing a wheel speed sensor typically costs $100-$300, including parts and labor.
9. Can a faulty ABS module cause the C1175 code?
Yes, although less common, a malfunctioning ABS module can fail to process the sensor signal properly, leading to this code.
10. Will clearing the code fix the issue permanently?
No, clearing the code without addressing the underlying problem will only temporarily remove the code. The issue must be diagnosed and repaired for a permanent fix.
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