U0174Lost Communication With Restraints System Sensor E
- Generic OBD-II code · Network
- How the car detects it
- U0174 refers to restraint sensor E, the fifth remote crash sensor in J2012 lettering. No manufacturer documents U0174 publicly. Chrysler's Jeep tables in NHTSA file PE11-019 go from U0173 straight to U0175, so slot E is simply not used there. Where it is fitted, such a sensor usually hangs on a two-wire PSI5 line that carries power and data at once: the control unit sends sync pulses and expects the reply in a fixed time slot, so an open wire, a short or a dead sensor shows up as missing frames. Before buying parts, check with a scan tool whether the airbag unit is really configured for sensor E; a replacement unit with the wrong coding can complain about sensors the car does not have. U0475 is the invalid-data partner. Airbag lamp on, no MIL.
- What you may notice
- Airbag warning lamp on
- Scan tool lists sensor E as not responding
- Deployment paths depending on sensor E may be blocked
- Likely causes
- LikelyConnector at sensor E loose, wet or corroded
- PossibleAirbag unit coded for a sensor E that is not fitted (e.g. after unit replacement)
- PossibleTwo-wire sensor line open or shorted
- RareCrash sensor E internally failed
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.