U0429

What it means

The Steering Wheel Angle Sensor is present on the data bus but the values it reports are implausible — out of range, frozen, or failing the checksum or rolling-count check. The receiving modules reject the data. Stability control loses a trustworthy steering-angle value. Causes include a faulty sensor feeding the module, internal computation errors, a software or calibration mismatch after a repair, or bus interference corrupting the frames.

Is it safe to drive?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

• Steering angle sensor not calibrated

  high

  One of the most commonly reported causes for this code — check this first.

• Steering angle sensor failed

  medium

  A plausible cause — test and verify before replacing parts.

• Gateway module routing CAN messages incorrectly

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full U0429 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?