AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Lexus - B1140 Lexus

B1140 Lexus Code - Side Airbag Sensor Assembly Malfunction

- Code Popularity: 6,805 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC B1140 Lexus?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Side Airbag Sensor Assembly (Right Side)
  • Side Airbag Sensor Assembly (Right Side) harness is open or shorted
  • Side Airbag Sensor Assembly (Right Side) circuit poor electrical connection
  • Faulty Airbag Sensor Assembly Center
⚠ Does your Lexus have Safety Recalls? → Check here

How to Fix the DTC B1140 Lexus?

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

Search for B1140 Lexus Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1140 Lexus code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Air Bag Warning Light ON

Code B1140 Lexus Description

The Side Airbag Sensor Assembly (Right Side) consists of the safing sensor, diagnosis circuit, and lateral deceleration sensor, etc. It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated, and detects a diagnosis system malfunction. DTC B1140 is recorded when the occurrence of a malfunction in the Side Airbag Sensor Assembly (Right Side) is detected.

OBDII Code B1140 Lexus - Side Airbag Sensor Assembly Malfunction - AutoCodes.com
B1140 Lexus Code - Side Airbag Sensor Assembly Malfunction

Need More Information on the Code?

Need more information on how to fix the B1140 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1140 Lexus code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

Code B1140 Lexus comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1140 Lexus code? Have you replaced any parts?
Any information is appreciated. Thanks