C1235 – OBD-II DTC

OBD-II DTC C1235 – Speed Wheel RR Input Signal Missing

DTC C1235 meaning

DTC C1235 refers to a diagnostic trouble code indicating that the speed wheel input signal from the right rear wheel is missing. This code is part of the OBD-II system, which monitors various vehicle functions to ensure proper operation. The absence of this signal can affect the vehicle’s stability control, anti-lock braking system (ABS), and traction control systems.

DTC C1235 symptoms

Common symptoms associated with DTC C1235 may include:

• Illumination of the ABS warning light on the dashboard
• Loss of traction control functionality
• Inconsistent braking performance
• Potential activation of the stability control system
• Unusual noises from the braking system

DTC C1235 causes

Several factors can lead to the occurrence of DTC C1235, including:

• Faulty wheel speed sensor at the right rear wheel
• Damaged wiring or connectors related to the wheel speed sensor
• Corrosion or dirt on the sensor or its connector
• Issues with the ABS control module
• Faulty brake system components affecting sensor operation

DTC C1235 seriousness

DTC C1235 is considered a serious issue as it can compromise the vehicle’s braking and stability systems. If left unaddressed, it may lead to decreased vehicle control, especially in adverse driving conditions. It is advisable to diagnose and repair this issue promptly to ensure safe vehicle operation.

How to diagnose DTC C1235

To diagnose DTC C1235, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC C1235.
2. Inspect the right rear wheel speed sensor for physical damage or disconnection.
3. Check the wiring and connectors for signs of wear, corrosion, or damage.
4. Test the wheel speed sensor’s resistance and output signal using a multimeter.
5. Examine the ABS control module for any faults or error codes.
6. Clear the DTC and perform a test drive to see if the code reappears.

How to fix DTC C1235 step-by-step instructions

To fix DTC C1235, follow these steps:

1. Identify and replace a faulty right rear wheel speed sensor if necessary.
2. Repair or replace damaged wiring or connectors associated with the sensor.
3. Clean any corrosion or dirt from the sensor and its connector.
4. Inspect and, if needed, replace the ABS control module.
5. Recheck the system for any additional codes after repairs.
6. Clear the DTC using an OBD-II scanner and conduct a test drive to ensure the issue is resolved.

How to erase DTC C1235

To erase DTC C1235, 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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