U0172
Lost Communication With Restraints System Sensor C
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)
Symptoms
- The airbag light on the dashboard is on
- The passive safety system can be disabled
- Lack of response from shock sensors during diagnostics
- Errors in other security system modules
Causes
- Open or short circuit in the sensor circuit
- Safety sensor fault C
- Wiring harness damage
- Corrosion or poor contact in connectors
- Problems with the security ECU
How to Fix
- Check the continuity of the sensor circuit using a multimeter
- Inspect connectors and contacts for corrosion or damage
- Check the power supply and ground of the sensor
- If necessary, replace the faulty sensor
- Repair only from an authorized dealer