U0236Lost Communication With Column Lock Module
- Generic OBD-II code · Network
- How the car detects it
- U0236 reports that the column lock module, which electrically bolts and frees the steering shaft as theft protection, has stopped communicating. It has nothing to do with the steering angle sensor (U0126). GM bulletin 20-NA-114 for 2020-2021 Cadillac CT4, CT5 and Escalade, Chevrolet Tahoe and Suburban, GMC Yukon and export Corvette with electric column lock (RPO N06) states that U0212 stored by the cluster, body module or gateway is mis-mapped there and has the technician diagnose U0236 instead. Saab's 2011 U-code list names the slot Steering Column Lock Module. Since the start system usually waits for confirmation that the lock has released, a mute lock module can bring a steering lock warning or a refusal to start. U0537 covers invalid lock data; no MIL documented.
- What you may notice
- Steering lock or service steering column warning
- Engine does not crank or start
- Steering wheel stays locked
- Likely causes
- LikelyColumn lock module without power or ground (fuse, connector at column)
- PossibleHarness at the steering column chafed or plug loose after column work
- PossibleElectric column lock unit faulty
- RareLow battery voltage during start request
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.