OBD Guide
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B2729

Cushion Over-Temp Detected

B2729 is an OBD-II diagnostic trouble code meaning: Cushion Over-Temp Detected. Common causes: airbag squib overheating, wiring harness damage. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • Airbag light is on
  • Restraint system disabled
  • Error message on display

Causes

  • Airbag squib overheating
  • Wiring harness damage
  • Temperature sensor malfunction
  • Problems with the SDM control module
  • Short circuit in the circuit

How to Fix

  1. Diagnostics of the passive safety system with a scanner
  2. Checking the resistance of squibs
  3. Inspect the wiring harness for damage
  4. Checking temperature sensors
  5. Replacing faulty components
  6. Resetting the error and testing the system

Related codes

B0020B0021B0051B0053

FAQ

What does the B2729 code mean?

B2729 is an OBD-II diagnostic trouble code that indicates: Cushion Over-Temp Detected

What causes a B2729 error code?

The most common causes of B2729 include: Airbag squib overheating; Wiring harness damage; Temperature sensor malfunction; Problems with the SDM control module.

How do I fix a B2729 diagnostic trouble code?

To fix B2729: Diagnostics of the passive safety system with a scanner. Checking the resistance of squibs. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2729?

Do not drive — repair immediately

How much does it cost to fix B2729?

The estimated repair cost for B2729 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat