B2059 Lexus Code - Vehicle Speed Malfunction
Quick Answer
The seat belt control ECU receives vehicle speed information from the ECM and master cylinder solenoid (skid control ECU) via CAN communication. Common causes include Faulty Combination meter ECM, Faulty Master cylinder solenoid (skid control ECU), Faulty Seat belt control ECU. 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 Combination meter ECM, Faulty Master cylinder solenoid (skid control ECU), Faulty Seat belt control ECU.
- 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.
Code B2059 Lexus Description
What are the Possible Causes of the DTC B2059 Lexus?
- Faulty Combination meter ECM
- Faulty Master cylinder solenoid (skid control ECU)
- Faulty Seat belt control ECU
- Faulty Distance control ECU
How to Fix the DTC B2059 Lexus?
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 B2059 Lexus 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.
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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.
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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