01 The Significance of Clean and Balanced Fuel Injectors • 02 Bad Fuel Doesn't Just Hurt Performance — It Quietly Destroy… • 03 Escalade-V vs. Patrol Nismo: Unveiling the Hidden Gems of C… • 04 This Is How Burning Odors Mean An Electrical Short Under Th… • 05 What Happens Inside an Engine at High Speed • 06 What to Do If Your Airbags and Seatbelt Fail in a Car Crash • 07 This Easy Sensor Cleaning Trick Fixes Half of Modern Car Is… • 08 If My Brakes Are New, Why Do They Still Squeal? • 09 Can Motor Oil Substitute Transmission Fluid? A Comprehensiv… • 10 Engineering Safety Matters: Promoting a Culture of Safety i… •

DTC codes / U02xx · Lost communication with a control module / U0212

U0212Lost Communication With Steering Column Control Module

U0212 is a generic network communication code indicating that one or more control modules on the vehicle's controller area network (CAN) bus have stopped receiving messages from the steering column control module (SCCM). The computer detects this when the SCCM fails to broadcast its periodic status messages within the expected time window, which can be caused by a power, ground, or data-bus fault at the module itself.

SystemNetwork
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaLost communication with a control module

Symptoms you may notice

  • The steering wheel controls for audio, cruise control, or the horn stop responding
  • The turn signals or wipers may behave erratically or not work at all
  • A warning light or message on the dashboard indicating a steering or communication fault
  • The ignition may not recognize the key or allow the engine to start in some vehicles
  • Often no symptoms besides the warning light, especially if the fault is intermittent

Common causes, most likely first

  1. A blown fuse or poor connection in the power or ground circuit feeding the steering column control module
  2. Corroded, loose, or damaged wiring at the SCCM connector or along the steering column harness
  3. A faulty steering column control module itself, often due to internal electronic failure
  4. A shorted or open data bus wire (CAN high or CAN low) between the SCCM and the rest of the network
  5. Low battery voltage or a weak battery that causes modules to drop offline intermittently
  6. Water intrusion or physical damage to the SCCM from a collision or steering column repair

How to diagnose and fix it

  1. Verify battery voltage and charge the battery if it is below 12.4 volts, as low voltage is a common cause of communication codes
  2. Check all fuses that supply power to the steering column control module and replace any that are blown
  3. Inspect the SCCM connector and harness for corrosion, loose pins, or chafed wires, and repair as needed
  4. Measure resistance on the CAN bus at the diagnostic link connector (DLC) to check for a short or open circuit
  5. Perform a voltage drop test on the power and ground circuits at the SCCM to confirm they can carry current under load
  6. If wiring and power are good, substitute a known-good SCCM or perform a module swap to see if communication returns
  7. Clear the code and road-test the vehicle to confirm the repair, checking that all steering wheel functions work

Before you replace the steering column module

  • A weak or failing battery is a frequent hidden cause of U0212 because the SCCM may drop offline during cranking or low-voltage events, so always load-test the battery first.
  • The code can set intermittently from a loose ground connection at the steering column, which is often overlooked when only the module and fuses are checked.
  • Aftermarket accessories wired into the steering column harness, such as alarm systems or remote starters, can introduce noise or voltage drops that disrupt SCCM communication.
  • U0212 does not always mean the SCCM is dead; a shorted CAN bus wire elsewhere on the network can prevent the SCCM from communicating even though the module itself is fine.
  • Some vehicles require the SCCM to be programmed or calibrated after replacement, so a used module may not communicate until it is properly configured.

Can I keep driving with U0212?

If the steering wheel controls, horn, or turn signals are not working, avoid driving until the fault is diagnosed because these are safety-related functions. If only the warning light is on and the vehicle drives normally, you can drive cautiously to a repair shop, but do not ignore the code for long.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage