OBD Guide
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U11C3

ESM Lost Communication With TCM On DPT CAN

U11C3 is an OBD-II diagnostic trouble code meaning: ESM Lost Communication With TCM On DPT CAN. Common causes: broken or damaged can bus wires, tcm or esm power supply problems. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine light comes on
  • Incorrect gearbox operation
  • Engine power limitation
  • Gear shifting problems

Causes

  • Broken or damaged CAN bus wires
  • TCM or ESM power supply problems
  • TCM module malfunction
  • ESM module malfunction
  • Corrosion of contacts in connectors

How to Fix

  1. Check the integrity of the CAN bus wires between the ESM and TCM
  2. Check power and ground of ESM and TCM modules
  3. Inspect connectors for corrosion or damage
  4. Scan other modules for communication errors
  5. If necessary, replace the faulty module

Related codes

U0100U0101U11C0

FAQ

What does the U11C3 code mean?

U11C3 is an OBD-II diagnostic trouble code that indicates: ESM Lost Communication With TCM On DPT CAN

What causes a U11C3 error code?

The most common causes of U11C3 include: Broken or damaged CAN bus wires; TCM or ESM power supply problems; TCM module malfunction; ESM module malfunction.

How do I fix a U11C3 diagnostic trouble code?

To fix U11C3: Check the integrity of the CAN bus wires between the ESM and TCM. Check power and ground of ESM and TCM modules. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U11C3?

Limited driving only, diagnose soon

How much does it cost to fix U11C3?

The estimated repair cost for U11C3 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat