U0170: Lost Communication With Restraints System Sensor A
What Does U0170 Mean?
U0170 is a diagnostic trouble code indicating: Lost Communication With Restraints System Sensor A. This code relates to the network communication system. It has been reported in NHTSA complaints across 1 different vehicle models.
Common Causes
- 🔍 Sensor or control module malfunction
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"SERVICE AIR BAG MESSAGE IN DISPLAY, CODES U0170 LOST COMMUNICATION WITH RESTRAINTS SYSTEM SENSOR A AND B0081 PASSENGER PRESENCE SYSTEM ERRATIC. THIS VEHICLE RAN OUT OF MANUFACTURE WARRANTY 2-28-15. I DIAGNOSED AND REPAIRED BECAUSE OF THE CAR BEING OUT OF WARRANTY AND THE DEALERSHIP WANTING 140 SOME "
— Chevrolet Traverse owner, 06/06/2015
Source: NHTSA Complaints Database
Most Reported Vehicles for U0170
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHEVROLET TRAVERSE |
Frequently Asked Questions
What causes communication codes?
Can a bad battery cause network codes?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Check battery voltage and ground connections; inspect CAN bus wiring
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.