OBD code C004A indicates an issue with the Brake Lining Wear Sensor circuit in the AntiLock Brake System (ABS).
Symptoms include the ABS Warning Light and Engine Light being illuminated.
This is commonly caused by a faulty sensor or wiring issues.
While not a critical problem, it can affect brake performance.
To fix, inspect the sensor, wiring harness, and connectors for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the c004a OBD Code
The vehicle displays a warning light indicating an issue with the right rear wheel speed sensor.
- Symptoms: AntiLock Brake System (ABS) Warning Light ON.
- Engine Light ON (or Service Engine Soon Warning Light).
- Possible loss of ABS functionality.
- Brake pedal may feel different during braking.
- Unusual noises from the ABS system.
Causes of the c004a OBD Code
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Possible triggers for fault code C004A include faulty wheel speed sensor or damaged wiring.
- C004A can be caused by a Faulty Brake Lining Wear Sensor.
- A Brake Lining Wear Sensor harness that is open or shorted.
- A Brake Lining Wear Sensor circuit with poor electrical connection.
Fixing Error Code c004a Step By Step
To resolve fault code C004A, inspect and repair the right front wheel speed sensor circuit.
- To fix OBDII code C004A, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the wheel speed sensor wiring and connections for any issues.
- Test the wheel speed sensors for proper operation and replace any faulty sensors.
- Clear the fault codes from the vehicle’s computer using a scan tool.
- Test drive the vehicle to verify that the code does not return, indicating a successful repair.
Cost Of Fixing c004a Fault Code
The repair for fault code C004A may involve replacing the right rear wheel speed sensor.
The cost to diagnose and fix OBD code C004A depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour.
The total cost will vary based on shop rates and the complexity of the repair.
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Details of the c004a OBD Code
Fault code C004A relates to an issue with the right rear wheel speed sensor.
OBD code C004A means Right Rear Wheel Speed Sensor Circuit Range/Performance on a vehicle.
This code is triggered by the AntiLock Brake System (ABS) module when it detects a discrepancy in the signal from the right rear wheel speed sensor.
The ABS module monitors individual wheel speeds to ensure proper braking performance and stability control.
When the signal from the right rear wheel speed sensor is out of the expected range or not performing within specified parameters, the C004A fault code is set.
This can indicate issues with the sensor itself, wiring/connectors, or the wheel speed sensor tone ring.
Mechanic’s Tech Notes
Code C004A indicates a problem with the right rear wheel speed sensor circuit.
To diagnose and fix OBDII code C004A, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) network with a scan tool.
If the TCM does not respond, reprogramming or reflashing may be necessary.
Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of being broken, bent, pushed out, or corroded.
Address any issues found during the inspection to resolve the C004A fault code.
FAQ
OBD code C004A indicates a faulty Brake Lining Wear Sensor or related wiring issues. Check sensor, harness, and connectors for damage or poor connection.
Common symptoms for OBD code C004A include ABS warning light on, engine light on, caused by faulty brake lining wear sensor or related wiring issues. Fix: inspect and repair wiring.
Diagnose OBD code C004A by checking for faulty brake lining wear sensor, open/shorted harness, or poor connection. Inspect wiring harness and connectors for damage or corrosion.
Wrap Up
If your ABS warning light is on and you retrieve OBDII code c004a, it may indicate a faulty right rear wheel speed sensor or issues with the sensor circuit.
This could be caused by a damaged sensor, wiring harness problems, or poor connections at the sensor or module.
To address OBDII code c004a, start by inspecting the right rear wheel speed sensor and its wiring for any visible damage.
Test the sensor’s resistance and check for proper voltage supply and ground connections.
Replace the sensor if necessary and ensure all connections are secure.
