OBD Guide
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C1437

Lost Communication With ECM

C1437 is an OBD-II diagnostic trouble code meaning: Lost Communication With ECM. Common causes: open or short circuit in wiring harness, ecm malfunction. Estimated repair cost: $56–333.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Check Engine light comes on
  • Loss of engine power
  • Incorrect transmission operation
  • Disabling driver assistance systems

Causes

  • Open or short circuit in wiring harness
  • ECM malfunction
  • ECM power problems
  • Contact corrosion
  • Problems with the CAN bus

How to Fix

  1. Check the integrity of the wiring harness
  2. Check ECM power and ground
  3. Scan all modules for additional errors
  4. Check the status of the CAN bus
  5. Replace ECM if necessary

Related codes

U0100U0101U0121

FAQ

What does the C1437 code mean?

C1437 is an OBD-II diagnostic trouble code that indicates: Lost Communication With ECM

What causes a C1437 error code?

The most common causes of C1437 include: Open or short circuit in wiring harness; ECM malfunction; ECM power problems; Contact corrosion.

How do I fix a C1437 diagnostic trouble code?

To fix C1437: Check the integrity of the wiring harness. Check ECM power and ground. Scan all modules for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1437?

Limited driving only, diagnose soon

How much does it cost to fix C1437?

The estimated repair cost for C1437 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat