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B2059 Lexus Code - Vehicle Speed Malfunction

Quick Answer

The B2059 diagnostic trouble code for Lexus vehicles indicates a Vehicle Speed Malfunction. Common causes include Faulty vehicle speed sensor, Damaged wiring or connectors related to the speed sensor, Corroded or dirty speed sensor 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
B2059 Lexus indicates Vehicle Speed Malfunction.
Common causes
Common causes include Faulty vehicle speed sensor, Damaged wiring or connectors related to the speed sensor, Corroded or dirty speed sensor 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 10, 2024
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Code B2059 Lexus Description

The B2059 diagnostic trouble code for Lexus vehicles indicates a Vehicle Speed Malfunction. This code is triggered when the vehicle's onboard computer detects an issue with the vehicle speed sensor or related components. The vehicle speed sensor is responsible for monitoring the speed of the vehicle and sending this information to the engine control module. This data is crucial for various vehicle systems, including the transmission, ABS, and traction control systems.

OBDII Code B2059 Lexus - Vehicle Speed Malfunction
B2059 Lexus Code - Vehicle Speed Malfunction

Common Causes of B2059 Lexus

  1. Faulty vehicle speed sensor
  2. Damaged wiring or connectors related to the speed sensor
  3. Corroded or dirty speed sensor connections
  4. Issues with the vehicle's ECM or PCM

Symptoms of B2059 Lexus

  1. Inaccurate speedometer readings
  2. Cruise control not engaging or disengaging properly
  3. Transmission shifting issues
  4. ABS or traction control warning lights illuminated on the dashboard

How to Fix B2059 Lexus

  1. Diagnose the issue by using a scan tool to retrieve the trouble code and test the vehicle speed sensor.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the vehicle speed sensor and replace if it is found to be faulty.
  4. Clear the trouble code from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.
  5. Perform a final check to verify that the speedometer, cruise control, transmission, ABS, and traction control systems are all functioning properly.

Cost to Fix B2059 Lexus

The typical repair costs for a Vehicle Speed Malfunction can range from $150 to $400, depending on the extent of the issue and the cost of parts. This estimate includes the cost of a new vehicle speed sensor, wiring repairs, and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly. It's recommended to check with local shops for a more accurate estimate based on your location and vehicle model.

Need more information about the B2059 Lexus code?

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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 B2059 Lexus Code

1. What are the common symptoms of OBDII code B2059 (Vehicle Speed Malfunction) in a Lexus?

- Common symptoms include erratic speedometer readings, cruise control issues, and an illuminated check engine light.

2. What are the possible causes of OBDII code B2059 in a Lexus?

- The code B2059 can be triggered by a faulty vehicle speed sensor, a damaged sensor wire harness, or a malfunctioning ABS module.

3. How can I diagnose the cause of OBDII code B2059 in my Lexus?

- To diagnose the issue, you can conduct a visual inspection of the speed sensor and its wiring harness, perform a scan with an OBDII scanner, and test the sensor's output signal.

4. Can driving with OBDII code B2059 in a Lexus cause further damage to the vehicle?

- While it is not advisable to ignore the code, driving with B2059 is unlikely to cause immediate harm to the vehicle. However, it can lead to inaccurate speed readings and potential safety concerns.

5. How can I repair OBDII code B2059 in my Lexus?

- Repairing B2059 typically involves replacing the faulty vehicle speed sensor, repairing any damaged wiring, or addressing issues with the ABS module if necessary.

6. Is it possible to reset OBDII code B2059 in a Lexus without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is essential to address the root cause to prevent the code from reoccurring.

7. Are there any DIY tips for fixing OBDII code B2059 in a Lexus?

- DIY enthusiasts can attempt to replace the vehicle speed sensor themselves if they have the necessary tools and experience. However, professional diagnosis and repair are recommended for accurate and reliable fixes.

8. How long does it typically take to repair OBDII code B2059 in a Lexus at a professional auto repair shop?

- The repair time can vary depending on the exact cause of the code and the shop's workload. However, replacing a vehicle speed sensor and addressing related issues usually takes a few hours.

9. Can extreme weather conditions affect the triggering of OBDII code B2059 in a Lexus?

- Yes, extreme weather conditions can impact sensor performance and wiring integrity, potentially leading to the triggering of code B2059. Inspecting these components during such conditions can be beneficial.

10. Is it safe to drive my Lexus with OBDII code B2059 if the vehicle speedometer is not functioning correctly?

- It is not recommended to drive the vehicle if the speedometer is not functioning correctly due to code B2059, as it can lead to unsafe driving conditions and potential legal issues.

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