Yaw Rate Sensor Range/Performance
What does C0201 mean?
The C0201 code means the vehicle's onboard diagnostic system has detected: Yaw Rate Sensor Range/Performance. This is a critical severity code.
Common Symptoms
- Stability control warning light on
- Traction control disabled
- False stability control interventions
- Service StabiliTrak message
- Vehicle may feel like brakes are applied in turns
Probable Causes (Ranked by Likelihood)
- Yaw rate sensor producing erratic or out-of-range signals Very High
- Sensor mounting loose causing vibration-induced errors High
- Aftermarket suspension modifications altering vehicle dynamics Moderate
- Yaw rate sensor internal calibration drift Moderate
- Electronic stability control module processing error Low
Step-by-Step Diagnostic Procedure
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Monitor yaw rate sensor data during straight-line driving -- should read near zero
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Check sensor mounting for looseness or misalignment
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Verify no aftermarket suspension modifications are affecting readings
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Clear codes and perform a yaw sensor calibration drive
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Compare yaw rate to steering angle during controlled turns to verify correlation
Frequently Asked Questions
Can a lift kit cause C0201?
Yes. Aftermarket lift kits and suspension modifications change the vehicle's center of gravity and dynamic behavior, which can cause the yaw rate sensor readings to fall outside the expected range.
Why does my stability control activate when it should not?
A yaw rate sensor with range/performance issues may send erratic signals to the stability control module, causing it to intervene when the vehicle is actually stable. This is both annoying and potentially dangerous.
Is the yaw rate sensor the same as the steering angle sensor?
No. The yaw rate sensor measures actual vehicle rotation, while the steering angle sensor measures the driver's steering input. The stability control system compares both to detect when the vehicle is not going where the driver intends.