what does C1234 mean in my Toyota Corolla E140 (2006-2013) and how to fix it

• •ABS warning light illuminated on the dashboard
• •Traction control light illuminated
• •Unresponsive ABS system during braking
• •Increased stopping distance
• •Unusual noises from the ABS module during braking

1. 1Use an OBD-II scanner to confirm the C1234 code and check for any additional codes.
2. 2Inspect the wheel speed sensors for damage, disconnection, or corrosion.
3. 3Measure the resistance of each wheel speed sensor to ensure they are within specifications (typically around 1,000-2,000 ohms).
4. 4Inspect wiring and connectors for any signs of wear, fraying, or corrosion.
5. 5Check the ABS control module for any fault codes or malfunctions.
6. 6Test the ABS pump operation and ensure it is functioning correctly.

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

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

• •OBD-II scanner
• •Socket set
• •Torque wrench
• •Multimeter
• •Jack and jack stands

• •Wheel speed sensor (if faulty)
• •Electrical connectors (if damaged)