U0212: Lost Communication with Steering Column Control Module

What it means

Communication with the Steering Column Control Module was not received as expected. The code does not establish which steering-column or switch functions are affected.

At a glance

• Usually lights the warning light of the system that lost communication

How it works

The Steering Column Control Module manages steering-column or switch functions assigned to it and communicates with other modules over the vehicle network. This code is set when expected messages from that module are not received; the code does not say which steering-column functions are affected.

Common causes

Most likely first.

1. Clockspring failed
2. Steering column module unpowered
3. Gateway module routing CAN messages incorrectly

Symptoms

• Multiple warning lights may illuminate
• Affected modules may go into limp mode or shut down
• Specific functions inoperative depending on module
• Diagnostic tools may show communication faults

How to diagnose it

1. Record freeze-frame data and scan all modules for communication codes to check whether this is an isolated module fault or part of a wider network problem.
2. Check the battery condition and the module's fuses and grounds before investigating data wiring.
3. Inspect the Steering Column Control Module connectors and accessible wiring for looseness, corrosion, or damage.
4. Use a capable scan tool to check module response and gateway communication, and verify whether related steering-column functions have failed.
5. If the module has power and ground but will not communicate, test the network path; inspect the clockspring only when symptoms and the vehicle's wiring information point to it, following the manufacturer's safety procedure.

Common fixes

• Restore a loose or corroded power, ground, or connector connection at the module.
• Replace a blown fuse after correcting the cause.
• Repair damaged network wiring or connector terminals to the Steering Column Control Module.
• Replace a failed clockspring if testing confirms it is the cause and the applicable safety procedure is followed.
• Replace the control module only after its supply, network path, and related wiring test correctly.

Can I keep driving?

If steering effort or control is abnormal, or steering related warnings appear, stop safely and do not continue until the fault is assessed. A communication fault can also disable steering-column switches or other assigned functions; airbag-related wiring may be nearby, so avoid probing it.