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B167B Toyota Code - Lost Communication with Front Door Pressure Sensor LH

Quick Answer

The Diagnostic Trouble Code (DTC) B167B indicates a loss of communication with the Front Door Pressure Sensor on the left-hand side (LH) of the vehicle. Common causes include Side Collision Sensor Left harness is open or shorted, Side Collision Sensor Left circuit has a poor electrical connection, Faulty Airbag Sensor Assembly. 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
B167B Toyota indicates Lost Communication with Front Door Pressure Sensor LH.
Common causes
Common causes include Side Collision Sensor Left harness is open or shorted, Side Collision Sensor Left circuit has a poor electrical connection, Faulty Airbag Sensor Assembly.
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.
What is this?
Table of contents Created and updated by William Orellana on Nov 05, 2025
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Code B167B Toyota Description

The Diagnostic Trouble Code (DTC) B167B indicates a loss of communication with the Front Door Pressure Sensor on the left-hand side (LH) of the vehicle. This sensor plays a critical role in the vehicle's airbag system, specifically in detecting side impacts. The Side Collision Sensor Left circuit comprises several components, including the Airbag Sensor Assembly, the Door Side Airbag Sensor Left (LH), and the Side No. 2 Airbag Sensor Left (LH). These sensors work together to monitor the vehicle's surroundings and assess the severity of any impacts. When an impact is detected, they send signals to the Airbag Sensor Assembly, which determines whether to deploy the airbags and pretensioners to protect the occupants.
OBDII Code B167B Toyota - Lost Communication with Front Door Pressure Sensor LH
B167B Toyota Code - Lost Communication with Front Door Pressure Sensor LH

Common Causes of B167B Toyota

  1. Side Collision Sensor Left harness is open or shorted
  2. Side Collision Sensor Left circuit has a poor electrical connection
  3. Faulty Airbag Sensor Assembly
  4. Defective Door Side Airbag Sensor Left (LH)
  5. Malfunctioning Side No. 2 Airbag Sensor Left (LH)

Symptoms of B167B Toyota

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Airbag warning light illuminated on the dashboard
  3. Inconsistent airbag deployment during diagnostic tests
  4. Potential failure of side airbags to deploy in the event of a side collision
  5. Diagnostic tool indicates communication errors with the Front Door Pressure Sensor LH

How to Fix B167B Toyota

  1. Perform a visual inspection of the wiring and connectors associated with the Front Door Pressure Sensor LH for any signs of damage or corrosion.
  2. Use a multimeter to check for continuity in the Side Collision Sensor Left harness and identify any open or shorted circuits.
  3. If necessary, repair or replace damaged wiring and connectors to restore proper communication.
  4. Test the functionality of the Door Side Airbag Sensor Left (LH) and Side No. 2 Airbag Sensor Left (LH) using a diagnostic tool to ensure they are operating correctly.
  5. If all components are functioning properly and the code persists, consider replacing the Airbag Sensor Assembly.

Cost to Fix B167B Toyota

The cost to diagnose and repair the B167B code can vary significantly based on the specific issues found and the labor rates in your area. Typically, parts and labor can range from $150 to $600, depending on whether wiring repairs, sensor replacements, or airbag assembly replacements are necessary. Most repair shops charge between $80 and $150 per hour, with dealerships often being on the higher end of that spectrum. Independent shops may offer lower rates, but costs can fluctuate based on the vehicle's make and model, as well as the complexity of the repair.

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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.

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