AutoCodes – Generic – B2729

B2729 Code - Cushion Over-Temp Detected

Quick Answer

The Seat Control Module E (SCME) monitors seat cushion temperature while it supplies voltage and ground to both blower motors. Common causes include Restricted Driver Seat Cushion Blower Motor Filter, Faulty Driver Seat Cushion Blower Motor, Driver Seat Cushion Blower Motor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2729 indicates Cushion Over-Temp Detected.
Common causes: Common causes include Restricted Driver Seat Cushion Blower Motor Filter, Faulty Driver Seat Cushion Blower Motor, Driver Seat Cushion Blower Motor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,827

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2729 Description

The Seat Control Module E (SCME) monitors seat cushion temperature while it supplies voltage and ground to both blower motors. The SCME also supplies a variable voltage signal to control the blower speed. Cabin air enters the blower through a filter integrated to the blower motor housing. Heated or cooled air exits the blower motor and flows through the foam pad.
If the driver seat cushion blower motor temperature exceeds 70 Â° C (158 Â° F) in cool mode or 85 Â° C (185 Â° F) in heat mode for more than 4 seconds the SCME shuts down the driver seat system and sets this Diagnostic Trouble Code (DTC).

OBDII Code B2729 - Cushion Over-Temp Detected - AutoCodes.com — B2729 Code - Cushion Over-Temp Detected

What does this mean?

What are the Possible Causes of the DTC B2729?

Restricted Driver Seat Cushion Blower Motor Filter
Faulty Driver Seat Cushion Blower Motor
Driver Seat Cushion Blower Motor harness is open or shorted
Driver Seat Cushion Blower Motor circuit poor electrical connection
Faulty Seat Control Module E (SCME)

How to Fix the DTC B2729?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2729 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B2729 code?

Need more information on how to fix the B2729 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2729 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2729 Ford — Cushion Over-Temp Detected
B2729 Infiniti — Front Sonar Sensor Left Outer
B2729 Lincoln — Cushion Over-Temp Detected
B2729 Mercury — Cushion Over-Temp Detected
B2729 Nissan — Front Sonar Sensor Left Outer

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2729 Code

1. What are common symptoms of OBDII code B2729 (Cushion Over-Temp Detected)?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.

2. What causes the OBDII code B2729 to trigger?

- This code is typically triggered by a malfunction in the cushion over-temperature sensor within the airbag system.

3. How serious is the OBDII code B2729 (Cushion Over-Temp Detected)?

- This code indicates a potential issue with the airbag system, which is a crucial safety component in the vehicle. It should be addressed promptly.

4. Can I continue driving with the OBDII code B2729 active?

- It is not recommended to drive the vehicle with an active airbag-related fault code like B2729. Have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose the cause of OBDII code B2729?

- Diagnosing this code usually involves using a professional OBDII scanner to read the specific details of the fault within the airbag system.

6. Is it safe to reset the OBDII code B2729 without repairing the issue?

- Resetting the code without addressing the underlying problem can temporarily clear the warning light, but the issue will likely reoccur. It's important to fix the root cause.

7. What are some repair tips for fixing OBDII code B2729?

- Repair tips may include checking the wiring and connections to the cushion over-temperature sensor, replacing the sensor if faulty, or consulting a professional for assistance.

8. How much does it typically cost to repair OBDII code B2729?

- Repair costs can vary depending on the exact cause of the code and the labor rates in your area. It's advisable to obtain quotes from automotive professionals.

9. Can weather conditions affect the triggering of OBDII code B2729?

- Extreme temperatures or humidity levels can potentially impact the functioning of the cushion over-temperature sensor and lead to the triggering of this code.

10. Will OBDII code B2729 prevent my vehicle from passing an emissions test?

- The presence of this code may cause your vehicle to fail an emissions test, as it indicates a fault in the airbag system, which is a safety-critical component.