What does it mean?
C1443 is a Chassis (ABS, traction control, steering) fault code. It indicates: Invalid Data Received from Yaw Rate Sensor` .
Symptoms
- Stability and traction control lamps on with the systems switched off
- No stability intervention during a slide, or unexpected intervention on a straight road
- Yaw rate value on live data disagrees with the direction of the turn
- ABS may still function normally in a straight line
- Fault often returns after a few turns rather than immediately
Likely causes
- Yaw rate sensor internal drift, giving a value that no longer matches vehicle motion
- Sensor never zeroed after replacement, accident repair or an alignment
- Loose sensor mounting or a bent bracket changing its reference plane
- Damaged network wiring or a poor connector causing corrupted messages
- Supply voltage or ground fault at the sensor
- Faulty steering angle or wheel speed input making the comparison fail even though the yaw sensor is good
- Software or configuration mismatch after a module replacement
How to fix it
- Read yaw rate, steering angle and all four wheel speeds together during a slow turn in both directions
- Identify which of those signals does not follow the vehicle motion
- Check the sensor mounting, bracket and orientation
- Inspect the connector and wiring for corrosion, damage and loose pins
- Measure supply and ground at the sensor and check the bus lines
- Perform the zero point calibration after any suspension or alignment work
- Replace the sensor and recalibrate only once the other compared inputs are proven correct