U0170
Lost Communication With Restraints System Sensor A
U0170 is an OBD-II diagnostic trouble code meaning: Lost Communication With Restraints System Sensor A. Common causes: broken or damaged wires to the sensor, oxidation of contacts in connectors. Estimated repair cost: $22–167.
Symptoms
- Airbag light (SRS) is on
- SRS system does not respond to diagnostics
- Security error message on display
- Belt pretensioners may not work
Causes
- Broken or damaged wires to the sensor
- Oxidation of contacts in connectors
- Security sensor malfunction
- Problems with the SRS module
- Short circuit in the circuit
How to Fix
- Check the integrity of the wiring harness to the sensor
- Clean the contacts in the sensor connectors
- Check sensor resistance according to specification
- Scan the SRS module for additional errors
- Repair only from an authorized dealer
Related codes
Error U0170 by Vehicle Brand
FAQ
What does the U0170 code mean?
U0170 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Restraints System Sensor A
What causes a U0170 error code?
The most common causes of U0170 include: Broken or damaged wires to the sensor; Oxidation of contacts in connectors; Security sensor malfunction; Problems with the SRS module.
How do I fix a U0170 diagnostic trouble code?
To fix U0170: Check the integrity of the wiring harness to the sensor. Clean the contacts in the sensor connectors. Check sensor resistance according to specification. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0170?
Do not drive — repair immediately
How much does it cost to fix U0170?
The estimated repair cost for U0170 is $22–167. Actual cost depends on your vehicle, location, and labor rates.
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