Engine-CodesFord – C1175 Ford

C1175 Ford Code - Left Rear Wheel Speed Sensor Input Circuit Failure

Quick Answer

The C1175 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the left rear wheel speed sensor input circuit. Common causes include Faulty left rear wheel speed sensor, Damaged or corroded wiring harness leading to the sensor, Loose or corroded connectors between the sensor and the ECM. 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 Ford indicates Left Rear Wheel Speed Sensor Input Circuit Failure.
Common causes
Common causes include Faulty left rear wheel speed sensor, Damaged or corroded wiring harness leading to the sensor, Loose or corroded connectors between the sensor and the ECM.
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.
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code C1175 Ford Description

The C1175 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the left rear wheel speed sensor input circuit. This sensor plays a crucial role in the vehicle's anti-lock braking system (ABS) and traction control system by monitoring the speed of the left rear wheel and sending this information to the vehicle's electronic control module (ECM). The ECM uses this data to determine the appropriate braking force for each wheel, ensuring optimal traction and stability during braking and acceleration.

OBDII Code C1175 Ford - Left Rear Wheel Speed Sensor Input Circuit Failure
C1175 Ford Code - Left Rear Wheel Speed Sensor Input Circuit Failure

Common Causes of C1175 Ford

  1. Faulty left rear wheel speed sensor
  2. Damaged or corroded wiring harness leading to the sensor
  3. Loose or corroded connectors between the sensor and the ECM
  4. ECM malfunction or software issue
  5. Physical damage to the sensor or its mounting location

Symptoms of C1175 Ford

  1. Illuminated ABS or traction control warning light on the instrument panel
  2. ABS system activation or pulsation during normal braking
  3. Increased stopping distances or difficulty braking on slippery surfaces
  4. Loss of traction or stability control during acceleration or cornering

How to Fix C1175 Ford

  1. Begin by diagnosing the specific cause of the C1175 code using a diagnostic scanner and multimeter to test the left rear wheel speed sensor, wiring, connectors, and ECM.
  2. If the issue is with the sensor itself, replace the left rear wheel speed sensor with a new OEM or aftermarket unit. Ensure proper installation and calibration according to manufacturer specifications.
  3. Inspect the wiring harness and connectors for damage, corrosion, or loose connections. Repair or replace any damaged components as needed.
  4. Clear the DTC from the ECM memory using the diagnostic scanner and perform a road test to verify that the code does not return and that the ABS and traction control systems are functioning correctly.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix C1175 Ford

The cost of repairing a C1175 Ford DTC can vary depending on the specific cause of the issue and the labor rates at the repair facility. On average, the cost of replacing a wheel speed sensor can range from $100 to $200, while addressing wiring or connector issues may add to the total cost. Including parts and labor, the total repair cost for this issue could range from $150 to $400. It is advisable to consult with a qualified mechanic or repair shop to obtain a more accurate estimate based on the specific circumstances of the vehicle in question.

Tech Notes for C1175 Ford









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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1175 Ford Code

1. What are the common symptoms of OBDII code C1175 Ford (Left Rear Wheel Speed Sensor Input Circuit Failure)?

The common symptoms include ABS warning light illuminated on the dashboard, traction control issues, and potential loss of stability control.

2. What are some possible causes of OBDII code C1175 Ford?

Possible causes of this code include a faulty left rear wheel speed sensor, damaged wiring or connectors in the circuit, or a problem with the ABS module.

3. How can I diagnose the cause of OBDII code C1175 Ford?

To diagnose the issue, you can use a diagnostic scan tool to read the fault codes, inspect the wiring and connections of the left rear wheel speed sensor, and perform a visual inspection of the sensor itself for any damage.

4. Can I still drive my vehicle with OBDII code C1175 Ford present?

It is not recommended to drive your vehicle with this code present, as it can affect the proper functioning of the ABS and stability control systems, potentially compromising your safety on the road.

5. How can I repair OBDII code C1175 Ford (Left Rear Wheel Speed Sensor Input Circuit Failure)?

Repair options include replacing the left rear wheel speed sensor, repairing any damaged wiring or connectors in the circuit, or addressing any issues with the ABS module as needed.

6. Is it necessary to reset the OBDII code C1175 Ford after making repairs?

Yes, it is recommended to reset the fault codes using a diagnostic scan tool after making repairs to clear the code and ensure that the issue has been resolved.

7. Can extreme weather conditions cause OBDII code C1175 Ford to trigger?

Yes, extreme weather conditions such as heavy rain, snow, or ice can potentially damage the wheel speed sensor or affect the circuit, leading to the triggering of this fault code.

8. Are there any preventive maintenance tips to avoid OBDII code C1175 Ford?

Regularly inspecting and maintaining the wheel speed sensors, checking the wiring and connectors for signs of wear or damage, and addressing any issues promptly can help prevent this fault code from occurring.

9. How long does it typically take to repair OBDII code C1175 Ford?

The repair time can vary depending on the exact cause of the issue, but it can typically take anywhere from 1-3 hours to diagnose and repair the left rear wheel speed sensor input circuit failure.

10. Can I fix OBDII code C1175 Ford myself, or do I need to take it to a professional mechanic?

While some DIY enthusiasts may be able to address this issue themselves by replacing the wheel speed sensor or repairing the circuit, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

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