U0172
Lost Communication With Restraints System Sensor C
U0172 is an OBD-II diagnostic trouble code meaning: Lost Communication With Restraints System Sensor C. Common causes: open or short circuit in the sensor circuit, safety sensor fault c. Estimated repair cost: $56–167.
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
Related codes
Error U0172 by Vehicle Brand
FAQ
What does the U0172 code mean?
U0172 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Restraints System Sensor C
What causes a U0172 error code?
The most common causes of U0172 include: Open or short circuit in the sensor circuit; Safety sensor fault C; Wiring harness damage; Corrosion or poor contact in connectors.
How do I fix a U0172 diagnostic trouble code?
To fix U0172: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0172?
Do not drive — repair immediately
How much does it cost to fix U0172?
The estimated repair cost for U0172 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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