CAN network

U0212 — Lost Communication with Steering Column Control Module

Severity: medium Drive with care, to a shop

What U0212 means

Code U0212 means one or more control units on the CAN bus stopped receiving messages from the steering column control module. This module usually handles turn signal and wiper stalks, steering wheel buttons, and on some cars the tilt and telescope motors. It normally talks to other modules constantly, so when its messages disappear the system logs a communication fault.

Symptoms

  • Steering wheel buttons do not work
  • Turn signal or other column switch problems
  • Several warning lights on the dash
  • Functions run by the column module are unavailable
  • Airbag light may come on
  • Tilt/telescope adjustment does not work

Possible causes

  1. Failed column module or clock spring
  2. Open, shorted or chafed CAN wiring near the column
  3. Corroded connector or terminals
  4. Power or ground fault at the module
  5. Another faulty module loading the CAN bus
  6. Wiring damage after repairs or accessory installs

How to diagnose

  1. Run a full-system scan and map which modules are not communicating
  2. Note whether the code is constant or comes and goes when turning the wheel
  3. Check CAN bus voltage and resistance at the diagnostic connector (about 60 ohms between CAN-H and CAN-L is typical)
  4. Inspect the connectors and harness around the steering column for damage and corrosion
  5. Test power, fuses and ground at the column module
  6. Wiggle the harness and clock spring with a scan tool connected and watch for communication dropouts
  7. Unplug suspect modules one at a time, only following a documented procedure
  8. If wiring checks out, test or substitute the module

Common fixes

  • Replace the clock spring or steering column module
  • Repair CAN wiring and restore insulation
  • Clean or replace corroded connectors and terminals
  • Restore module power and ground, replace a blown fuse
  • Replace a faulty module loading the bus and reprogram if required

Questions and answers

What does U0212 mean?

The control units lost communication with the steering column control module over the CAN bus. The cause may be the module itself, wiring or power.

Can I drive with U0212?

Usually yes, but carefully, since turn signals and wheel buttons may fail. Do not put the repair off for long.

What most often causes U0212?

A worn clock spring or damaged wiring in the column is common. Also check module power, ground and connectors.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.