C1175 – OBD-II DTC

OBD-II DTC C1175 – Speed Wheel Sensor LR Input Circuit Failure

DTC C1175 meaning

DTC C1175 refers to a diagnostic trouble code indicating a failure in the left rear speed wheel sensor input circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components to ensure proper functionality. The left rear speed wheel sensor is crucial for providing accurate wheel speed data to the vehicle’s anti-lock braking system (ABS) and traction control system (TCS).

DTC C1175 symptoms

Common symptoms associated with DTC C1175 may include:

• Illumination of the ABS warning light on the dashboard
• Loss of ABS functionality
• Increased stopping distances
• Unusual behavior of the traction control system
• Erratic speedometer readings

DTC C1175 causes

Several factors can lead to the occurrence of DTC C1175, including:

• Faulty left rear speed wheel sensor
• Damaged or corroded wiring in the sensor circuit
• Poor electrical connections at the sensor or the ABS module
• Faulty ABS control module
• Mechanical issues such as a damaged tone ring

DTC C1175 seriousness

DTC C1175 is considered a serious issue as it affects the vehicle’s braking system. The ABS and traction control systems rely on accurate wheel speed data to function correctly. If these systems are compromised, it can lead to decreased vehicle control, especially in slippery conditions, increasing the risk of accidents.

How to diagnose DTC C1175

To diagnose DTC C1175, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1175 code.
2. Inspect the left rear speed wheel sensor for physical damage or disconnection.
3. Check the wiring and connectors for signs of wear, corrosion, or damage.
4. Test the sensor’s resistance and output voltage according to manufacturer specifications.
5. Examine the ABS control module for any faults or issues.
6. Clear the code and perform a road test to see if the code reappears.

How to fix DTC C1175 step-by-step instructions

To fix DTC C1175, follow these steps:

1. Inspect and replace the left rear speed wheel sensor if it is faulty.
2. Repair or replace any damaged wiring or connectors in the sensor circuit.
3. Ensure all electrical connections are clean and secure.
4. If necessary, replace the ABS control module.
5. Check the tone ring for damage and replace it if needed.
6. After repairs, clear the DTC using an OBD-II scanner.
7. Perform a road test to confirm that the issue is resolved and the code does not return.

How to erase DTC C1175

To erase DTC C1175, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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