OBD Guide
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P3107

Airbag ECU Communication Circuit Malfunction Automatic Transmission

P3107 is an OBD-II diagnostic trouble code meaning: Airbag ECU Communication Circuit Malfunction Automatic Transmission. Common causes: open or short circuit in wiring harness, poor contact in connectors. Estimated repair cost: $56–278.

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

Symptoms

  • Airbag light is on
  • Airbag system inactive
  • Errors in other security-related systems
  • Problems with the automatic transmission

Causes

  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Airbag ECU malfunction
  • Automatic transmission problems
  • Contact corrosion

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect and clean the contacts in the connectors
  3. Check power and ground of ECU
  4. Scan the system for other errors
  5. Repair only from an authorized dealer

Related codes

B0100B0101P3106

FAQ

What does the P3107 code mean?

P3107 is an OBD-II diagnostic trouble code that indicates: Airbag ECU Communication Circuit Malfunction Automatic Transmission

What causes a P3107 error code?

The most common causes of P3107 include: Open or short circuit in wiring harness; Poor contact in connectors; Airbag ECU malfunction; Automatic transmission problems.

How do I fix a P3107 diagnostic trouble code?

To fix P3107: Check the integrity of the wiring harness. Inspect and clean the contacts in the connectors. Check power and ground of ECU. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3107?

Do not drive — repair immediately

How much does it cost to fix P3107?

The estimated repair cost for P3107 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat