C1952 Yaw Rate Sensor Open Circuit
The C1952 code indicates that the stability control ECU (VSC/VDC/ESC) has detected an open circuit in the signal, power, or ground circuit of the yaw rate sensor. This sensor measures the vehicle's rotation around its vertical axis; an open circuit prevents the ECU from receiving valid data, disabling stability control, traction control, and emergency brake assist systems.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty yaw rate sensor (internal open circuit)
- Damaged, cut, or disconnected wiring between the sensor and ECU (harness)
- Loose, corroded, or open terminals at the sensor or ECU connector
- Missing reference voltage (5V/12V) or ground to the sensor
- Faulty stability control ECU (VSC/VDC) - rare
3. Symptoms You Will Notice
- Check Engine Light or VSC/ESC warning light on
- Stability control, traction control, and emergency brake assist systems disabled
- Possible loss of ABS functionality in some vehicles
4. Step-by-Step Diagnosis
Scan for codes and verify C1952 is present
Visually inspect the yaw rate sensor connector and wiring for damage, corrosion, or loose connections
Check for proper voltage (5V or 12V) and ground at the sensor connector
Test the yaw rate sensor's internal resistance and signal output per manufacturer specifications
If all checks pass, suspect a faulty ECU (rare) and perform a continuity test between sensor and ECU
5. Frequently Asked Questions
Is it safe to drive?▼
No, it is not safe to drive with this code active. The vehicle's stability control, traction control, and emergency brake assist will be disabled, increasing the risk of loss of control, especially in slippery conditions.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on the cause. A yaw rate sensor replacement can cost $150-$400 for the part plus labor. Wiring repairs are usually less expensive, while ECU replacement can exceed $1000.