how to fix C1235 code in Honda CR-V Fifth Generation (2017-2022)

Honda CR-V Sixth Generation (2023-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

Error Code: C1235

3 min read

520 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix C1235 code related to the wheel speed sensor in Honda CR-V (2017-2022). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

C1235

Affected Component

Brakes

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before working on the brakes.

Symptoms

•ABS warning light illuminated on the dashboard
•Traction control light illuminated
•Erratic ABS operation during braking
•Vehicle stability issues, particularly on slippery surfaces
•Potential loss of ABS functionality

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any related trouble codes.
2
Inspect the left front wheel speed sensor and its wiring for physical damage or disconnection.
3
Check the wheel speed sensor connector for corrosion or poor connection.
4
Measure the resistance of the left front wheel speed sensor using a multimeter.
5
Verify the voltage supply to the wheel speed sensor.
6
Inspect the ABS module for any fault codes or issues.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Multimeter
•Torque wrench
•Wire brush or electrical cleaner

Parts Required

•Left front wheel speed sensor

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any related trouble codes.
2
Inspect the left front wheel speed sensor and its wiring for physical damage or disconnection.
3
Check the wheel speed sensor connector for corrosion or poor connection.
4
Measure the resistance of the left front wheel speed sensor using a multimeter.
5
Verify the voltage supply to the wheel speed sensor.
6
Inspect the ABS module for any fault codes or issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Wheel Speed Sensor

Tools Required:
- Socket set
- Multimeter
- Torque wrench
- Wire brush or electrical cleaner
Sub-steps:
1. Remove the front wheel on the left side of the vehicle using a jack and jack stands for safety.
2. Locate the wheel speed sensor mounted on the left front brake assembly.
3. Disconnect the electrical connector from the wheel speed sensor.
4. Remove the sensor from its mounting bracket using the socket set (usually secured by a bolt).
5. Clean the mounting area and inspect the new wheel speed sensor for any damage.
6. Install the new wheel speed sensor in the reverse order of removal. Torque the mounting bolt to the manufacturer's specifications (typically around 10-12 lb-ft).
7. Reconnect the electrical connector securely.

3. Check Wiring and Connectors

Sub-steps:
1. Inspect the wiring harness leading to the wheel speed sensor for any signs of fraying or damage.
2. Use the multimeter to check the resistance of the sensor (should be within manufacturer's range, typically 1,000-2,000 ohms).
3. If necessary, repair or replace any damaged wiring.

4. Reconnect Battery and Clear Codes

Reconnect the negative battery terminal.
Use the OBD-II scanner to clear any stored trouble codes from the system.