The OBD code C0034 for Ford indicates a fault with the Right Front Wheel Speed Sensor circuit.
Symptoms include the ABS Warning Light and Engine Light being illuminated.
This is usually caused by a faulty sensor, open/shorted harness, or poor electrical connection.
It is a moderate issue that can affect vehicle safety.
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) |
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Symptoms of the Ford c0034 OBD Code
The ABS warning light is illuminated on the dashboard for fault code C0034 in a Ford vehicle.
- Symptoms: AntiLock Brake System (ABS) Warning Light ON.
- Service Engine Soon Warning Light ON.
- Possible symptoms include a pulsating brake pedal when applying brakes.
- Unusual noises coming from the brakes, such as grinding or squealing.
- Decreased braking performance, especially during sudden stops.
Causes of the Ford c0034 OBD Code
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Possible reasons for fault code Ford C0034 include issues with the left rear wheel speed sensor.
- C0034 can be caused by a Faulty Right Front Wheel Speed Sensor.
- A Right Front Wheel Speed Sensor harness that is open or shorted.
- A Right Front Wheel Speed Sensor circuit with a poor electrical connection.
Fixing Ford Error Code c0034 Step By Step
Repairing fault code C0034 on a Ford involves inspecting the left rear wheel speed sensor circuit.
- To fix the Ford OBDII code C0034, start by reviewing the possible causes mentioned above.
- Visually examine the wiring harness and connectors related to the ABS system.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- If no issues are found with the wiring and connectors, proceed to test the wheel speed sensors for proper operation.
- Replace any faulty wheel speed sensors as needed.
- Clear the fault codes from the ABS module using a diagnostic scan tool.
- Test drive the vehicle to ensure the C0034 code does not return.
Cost Of Fixing Ford c0034 Fault Code
The repair for Ford fault code C0034 typically involves inspecting and replacing the right front wheel speed sensor.
The cost to diagnose and fix Ford OBD code C0034 is typically based on an estimated repair time of 1. 0 hour.
Labor rates range from $75 to $150 per hour, so the total cost will likely be between $75 and $150. Factors like shop rates and the complexity of the repair can influence the final cost.
Details of the Ford c0034 OBD Code
Ford code C0034 relates to an issue with the left rear wheel speed sensor.
Ford OBD code C0034 means Left Front Wheel Speed Sensor Circuit Range/Performance.
This code is triggered by the ABS module when it detects a discrepancy in the signal from the left front wheel speed sensor.
The ABS module monitors the wheel speed sensors to ensure they are functioning within expected parameters to help prevent wheel lockup during braking.
Mechanic’s Tech Notes
For Ford code C0034, check the left rear wheel speed sensor circuit for issues.
To diagnose and fix OBDII code C0034 in a Ford vehicle, start by visually inspecting the wiring harness and connectors related to the ABS module.
Look for any damage or corrosion.
Use a voltmeter to check for proper power and ground to the ABS module.
Additionally, a scan tool can help verify communication over the CAN network.
If no issues are found during these checks, the ABS module itself may be faulty and require replacement.
Reflashing the module with updated software could also be a potential solution.
FAQ
OBD code C0034 in a Ford indicates an issue with the Right Front Wheel Speed Sensor. Check sensor, harness, and connections for faults causing ABS and Engine warning lights.
Common symptoms for OBD code C0034 in a Ford vehicle include ABS warning light on, engine light on, caused by faulty right front wheel speed sensor or related wiring issues.
Diagnose and repair OBD code C0034 in your Ford by checking the right front wheel speed sensor, harness, and connections for faults. Repair as needed.

Wrap Up
If your Ford is showing OBD code c0034 and you’re experiencing issues with the ABS system like erratic braking behavior or ABS warning light, it could be caused by a faulty left rear wheel speed sensor, damaged wiring harness, or poor electrical connection at the sensor.
To address Ford OBD code c0034, start by inspecting the left rear wheel speed sensor and its wiring for any visible damage.
Test the sensor’s resistance and check the connector for corrosion or loose pins.
Replace the sensor if necessary and ensure proper connection for a reliable repair.