U0135Lost Communication With Differential Control Module - Front
- Generic OBD-II code · Network
- How the car detects it
- U0135 reports that the front differential control module has dropped off the network. Such a module operates an electronically controlled clutch pack or locker in the front axle, either to move torque from one front wheel to the other or to lock both for traction off road. No manufacturer documents U0135 in public; the closest documented case is the rear counterpart U0136, which GM's 2019 ECM tables monitor on the Cadillac XT4. CARB requires a separate code for lost communication with a digital input but leaves driveline modules to the manufacturer unless other diagnostics rely on them. U0436 covers implausible front-differential data, U0114 and U0102 the AWD clutch and transfer case. The front differential then usually works as an open one.
- What you may notice
- 4WD, locker or traction warning lamp
- Front locker or torque vectoring not available
- Likely causes
- LikelyFuse, supply, ground or CAN wiring of the front differential module faulty
- PossibleWater or corrosion in the connector near the front axle
- RareFront differential control module internally faulty
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.