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B2016 Lexus Code - Open in Right Side Lower MOS

Quick Answer

The B2016 diagnostic trouble code (DTC) in a Lexus indicates an open circuit in the Right Side Lower MOS (Metal Oxide Semiconductor) of the vehicle. Common causes include Corrosion or damage to wiring harness connected to the Right Side Lower MOS, Faulty MOS component, Poor electrical connections. 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
B2016 Lexus indicates Open in Right Side Lower MOS.
Common causes
Common causes include Corrosion or damage to wiring harness connected to the Right Side Lower MOS, Faulty MOS component, Poor electrical connections.
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 Sep 15, 2024
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Code B2016 Lexus Description

The B2016 diagnostic trouble code (DTC) in a Lexus indicates an open circuit in the Right Side Lower MOS (Metal Oxide Semiconductor) of the vehicle. The MOS is a crucial component in the vehicle's electrical system, responsible for controlling various functions such as power distribution, voltage regulation, and current flow. An open circuit in this area can disrupt the proper functioning of the system, leading to potential issues with the vehicle's performance and safety.

OBDII Code B2016 Lexus - Open in Right Side Lower MOS
B2016 Lexus Code - Open in Right Side Lower MOS

Common Causes of B2016 Lexus

  1. Corrosion or damage to wiring harness connected to the Right Side Lower MOS
  2. Faulty MOS component
  3. Poor electrical connections
  4. Water or moisture intrusion in the electrical system
  5. Overloading of the electrical system

Symptoms of B2016 Lexus

  1. Malfunctioning lights (headlights, taillights, interior lights)
  2. Power windows or door locks not working
  3. Electrical accessories not functioning properly
  4. Starting or charging issues
  5. Dashboard warning lights related to electrical system

How to Fix B2016 Lexus

  1. Begin by disconnecting the vehicle's battery to prevent any electrical hazards.
  2. Inspect the wiring harness and connections related to the Right Side Lower MOS for any signs of damage, corrosion, or loose connections.
  3. Test the MOS component to determine if it is faulty and needs replacement.
  4. Repair or replace any damaged wiring or connectors.
  5. Reconnect the battery and test the vehicle to ensure the issue has been resolved.

Cost to Fix B2016 Lexus

The typical repair costs for addressing an open circuit in the Right Side Lower MOS in a Lexus can range from $200 to $500, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.

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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.

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 B2016 Lexus Code

1. What are the common symptoms of OBDII code B2016 in a Lexus related to an open in the right side lower MOS?

- Common symptoms include issues with the right side lower MOS circuit, such as malfunctioning power windows or door locks.

2. What does the OBDII code B2016 indicating an open in the right side lower MOS mean in a Lexus?

- This code suggests that there is an open circuit in the right side lower MOS (Metal Oxide Semiconductor) in the vehicle.

3. What are the possible causes of the OBDII code B2016 in a Lexus indicating an open in the right side lower MOS?

- Causes can include damaged wiring, a faulty MOS switch, loose connections, or corrosion in the circuit.

4. How can I diagnose the issue related to the OBDII code B2016 in a Lexus with an open in the right side lower MOS?

- You can use a multimeter to test the continuity of the circuit, inspect the wiring for damage, and check the connections for any issues.

5. Is it safe to continue driving my Lexus with the OBDII code B2016 indicating an open in the right side lower MOS?

- It is not recommended to drive the vehicle with this issue, as it may affect the proper functioning of important systems like power windows and door locks.

6. Can I repair the open in the right side lower MOS circuit in my Lexus myself?

- Depending on your skills and experience with automotive electrical systems, you may be able to repair the issue yourself by identifying and fixing the open in the circuit.

7. How much does it typically cost to repair the OBDII code B2016 related to an open in the right side lower MOS in a Lexus?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing damaged wiring, the MOS switch, or fixing connections, which can range from moderate to expensive.

8. Are there any preventive measures I can take to avoid encountering the OBDII code B2016 in my Lexus?

- Regularly inspecting and maintaining the electrical components in your vehicle can help prevent issues like an open in the right side lower MOS from occurring.

9. Will resetting the OBDII code B2016 in my Lexus resolve the open in the right side lower MOS issue?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem of an open circuit in the right side lower MOS.

10. Can the OBDII code B2016 indicating an open in the right side lower MOS affect other systems in my Lexus?

- Yes, if left unresolved, this issue can potentially impact other systems that rely on the affected circuit, leading to more serious electrical problems in the vehicle.

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