OBD Guide
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U2138

Lost Communication With Steering Column Lock Control Module

U2138 is an OBD-II diagnostic trouble code meaning: Lost Communication With Steering Column Lock Control Module. Common causes: broken or damaged can bus wires, malfunction of the steering column lock module. Estimated repair cost: $89–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$89–278 (est.)

Symptoms

  • The steering wheel does not unlock when you turn the key
  • ESP/ABS malfunction indicator lights up
  • Engine won't start
  • Error message on the dashboard
  • Loss of communication with other modules

Causes

  • Broken or damaged CAN bus wires
  • Malfunction of the steering column lock module
  • Module power problems
  • Connector pin corrosion
  • Module software failure

How to Fix

  1. Check the integrity of the CAN bus wiring
  2. Check the power and ground of the blocking module
  3. Clean connector contacts
  4. Reflash the locking module
  5. Replace the steering column lock module

Related codes

U0121U2100U2148

FAQ

What does the U2138 code mean?

U2138 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Steering Column Lock Control Module

What causes a U2138 error code?

The most common causes of U2138 include: Broken or damaged CAN bus wires; Malfunction of the steering column lock module; Module power problems; Connector pin corrosion.

How do I fix a U2138 diagnostic trouble code?

To fix U2138: Check the integrity of the CAN bus wiring. Check the power and ground of the blocking module. Clean connector contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U2138?

Do not drive — repair immediately

How much does it cost to fix U2138?

The estimated repair cost for U2138 is $89–278. Actual cost depends on your vehicle, location, and labor rates.

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