U0170Lost Communication With Restraints System Sensor A
- Generic OBD-II code · Network
- How the car detects it
- U0170 is the first slot in the J2012 block for remote restraint sensors: sensor A has gone silent for the airbag control unit or another listener. Chrysler follows that scheme. In the Jeep airbag tables it handed to NHTSA (Wrangler JK 2007-2010, Compass/Patriot MK, Liberty KK, Grand Cherokee WK and Commander XK 2008) U0170 is the up-front left satellite acceleration sensor, and B1B70 reports an internal fault of that same part. GM assigns the number differently: the Saab 9-5 and 9-4X U-code lists give it to the passenger presence detection module, and GM bulletin PI1202 shows the SDM logging U0170 on 2013-14 Enclave, Traverse and Acadia when a harness rubbing on the exhaust disturbs the LAN. Airbag lamp on, no MIL.
- What you may notice
- Airbag warning lamp on
- Early frontal crash detection on the left reduced (Chrysler)
- On GM vehicles further U-codes in several modules at the same time
- Likely causes
- LikelyConnector at the front satellite sensor unplugged or corroded, often after front-end repairs
- PossibleSensor A or its bracket damaged in a frontal knock
- PossibleOn GM vehicles (passenger presence module) chafed or pinched low-speed LAN wiring
- RareSensor input of the airbag control unit faulty
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.