The Ford C1278-20 diagnostic trouble code (DTC) can be a frustrating issue for Ford Flex owners. This code indicates a problem with the steering angle sensor, a critical component of the vehicle’s stability control system. This article will explore potential causes of the C1278-20 code, common symptoms, and troubleshooting steps.
Understanding the Ford C1278-20 Code
The steering angle sensor measures the position of the steering wheel and transmits this information to various systems, including the electronic power steering (EPS), traction control, and stability control. When the sensor malfunctions or sends incorrect data, the C1278-20 code is triggered. This often results in issues like the vehicle pulling to one side, uneven tire wear, and activation of warning lights like the traction control light.
Symptoms Associated with C1278-20
Experiencing a pulling sensation while driving, especially after a recent transfer case replacement, can be a sign of the C1278-20 code. Other symptoms may include:
- Illuminated Traction Control Light: The traction control light on the dashboard may turn on and stay on.
- Vehicle Pulling to One Side: The car might consistently pull to the left or right, requiring constant steering correction.
- Grinding Noise During Braking: A grinding noise, particularly at low speeds, can sometimes accompany this code, potentially indicating related brake issues.
- Intermittent Issues: The symptoms and the warning lights might appear and disappear intermittently.
Possible Causes of Ford C1278-20
Several factors can contribute to the C1278-20 code, including:
- Faulty Steering Angle Sensor: The most common culprit is a malfunctioning steering angle sensor itself, requiring replacement.
- Wiring or Connector Problems: Damaged wiring or loose connections in the steering angle sensor circuit can disrupt signal transmission.
- Calibration Issues: The steering angle sensor may need recalibration after certain repairs, such as a transfer case replacement or front-end alignment.
- Damaged Clockspring: The clockspring, located within the steering wheel assembly, can become damaged and affect the sensor’s operation.
Troubleshooting the C1278-20 Code
Diagnosing the root cause of the C1278-20 code involves several steps:
- Code Retrieval: Use an OBD-II scanner to confirm the C1278-20 code and check for any other related codes.
- Visual Inspection: Inspect the wiring and connectors around the steering angle sensor for any visible damage or looseness.
- Steering Angle Sensor Test: Consult a repair manual for specific procedures to test the steering angle sensor using a multimeter or specialized diagnostic equipment.
- Clockspring Inspection: Examine the clockspring for any signs of damage or binding.
- Professional Diagnosis: If the issue persists, consult a qualified mechanic with experience in diagnosing and repairing Ford vehicles. They may need to perform advanced diagnostics to pinpoint the problem.
Conclusion
The Ford C1278-20 code signifies a problem within the steering angle sensor system, potentially impacting vehicle handling and safety features. While a faulty sensor is often the cause, addressing this issue requires a systematic approach to diagnose and resolve the underlying problem. If you are unsure about performing these steps yourself, seeking professional assistance is recommended to ensure a proper and safe repair.
