OBD Guide
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U11E3

TCM Lost Communication With ESM On DPT CAN

U11E3 is an OBD-II diagnostic trouble code meaning: TCM Lost Communication With ESM On DPT CAN. Common causes: broken or damaged can bus wires, poor contact in connectors. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Gear shifting problems
  • Check Engine light comes on
  • Reduced engine power
  • The car goes into emergency mode
  • Unstable engine operation

Causes

  • Broken or damaged CAN bus wires
  • Poor contact in connectors
  • TCM module malfunction
  • ESM module malfunction
  • Problems with module power supply

How to Fix

  1. Check the integrity of the CAN bus wires
  2. Inspect and clean connector contacts
  3. Check power supply to TCM and ESM modules
  4. Scan other modules for errors
  5. If necessary, replace the faulty module

Related codes

U11E2U11E4U11E5

FAQ

What does the U11E3 code mean?

U11E3 is an OBD-II diagnostic trouble code that indicates: TCM Lost Communication With ESM On DPT CAN

What causes a U11E3 error code?

The most common causes of U11E3 include: Broken or damaged CAN bus wires; Poor contact in connectors; TCM module malfunction; ESM module malfunction.

How do I fix a U11E3 diagnostic trouble code?

To fix U11E3: Check the integrity of the CAN bus wires. Inspect and clean connector contacts. Check power supply to TCM and ESM modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U11E3?

Do not drive — repair immediately

How much does it cost to fix U11E3?

The estimated repair cost for U11E3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat