C1144 – OBD-II DTC

OBD-II DTC C1144 – Wheel Speed Sensor RR Tone Ring Tooth Missing Fault

DTC C1144 meaning

DTC C1144 refers to a fault in the wheel speed sensor system, specifically indicating that there is a missing tooth on the rear tone ring. The tone ring is a component that works in conjunction with the wheel speed sensor to monitor the rotational speed of the wheel. When the sensor detects that a tooth is missing, it triggers this diagnostic trouble code (DTC).

DTC C1144 symptoms

Common symptoms associated with DTC C1144 may include:

• Illumination of the ABS warning light on the dashboard
• Inconsistent or erratic ABS operation
• Loss of traction control functionality
• Potential issues with stability control systems
• Unusual noises from the rear wheels during braking

DTC C1144 causes

Several factors can lead to the occurrence of DTC C1144, including:

• Physical damage to the tone ring, such as cracks or breaks
• Corrosion or debris buildup on the tone ring or sensor
• Faulty wheel speed sensor
• Wiring issues, such as shorts or open circuits in the sensor harness
• Improper installation or alignment of the tone ring

DTC C1144 seriousness

DTC C1144 is considered a serious issue as it can affect the vehicle’s braking performance and stability control systems. If left unaddressed, it may lead to compromised safety while driving, especially in adverse conditions. It is important to diagnose and repair this fault promptly to ensure the vehicle operates safely.

How to diagnose DTC C1144

To diagnose DTC C1144, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC C1144.
2. Inspect the rear tone ring for visible damage or missing teeth.
3. Check the wheel speed sensor for proper operation and connection.
4. Examine the wiring and connectors for signs of wear, corrosion, or damage.
5. Test the sensor output using a multimeter to ensure it is within specifications.
6. Clear the DTC and perform a test drive to see if the code reappears.

How to fix DTC C1144 step-by-step instructions

To fix DTC C1144, follow these steps:

1. Identify and replace the damaged tone ring if necessary.
2. Clean any debris or corrosion from the tone ring and sensor.
3. Replace the wheel speed sensor if it is found to be faulty.
4. Repair or replace any damaged wiring or connectors in the sensor circuit.
5. Ensure the tone ring is properly aligned and securely installed.
6. Reconnect the battery and clear the DTC using an OBD-II scanner.
7. Perform a test drive to verify that the issue has been resolved and the DTC does not return.

How to erase DTC C1144

To erase DTC C1144, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase the trouble codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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