AutoCodes – Lexus – C191B Lexus

C191B Lexus Code - Rear Vehicle Speed Signal

Quick Answer

The Active Stabilizer Suspension System uses CAN communication to gather information necessary for control functions. Common causes include Faulty Speed Sensor, Speed Sensor harness is open or shorted, Speed Sensor circuit poor electrical connection. 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: C191B Lexus indicates Rear Vehicle Speed Signal.
Common causes: Common causes include Faulty Speed Sensor, Speed Sensor harness is open or shorted, Speed Sensor circuit poor electrical connection.
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.

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Code Popularity 1,383

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C191B Lexus Description

The Active Stabilizer Suspension System uses CAN communication to gather information necessary for control functions. When a malfunction occurs in another system the Diagnostic Trouble Code (DTC) is stored.

OBDII Code C191B Lexus - Rear Vehicle Speed Signal - AutoCodes.com — C191B Lexus Code - Rear Vehicle Speed Signal

What does this mean?

What are the Possible Causes of the DTC C191B Lexus?

Faulty Speed Sensor
Speed Sensor harness is open or shorted
Speed Sensor circuit poor electrical connection
Faulty Rear Active Stabilizer Control ECU

How to Fix the DTC C191B 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 C191B 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.

Need more information about the C191B Lexus code?

Need more information on how to fix the C191B Lexus code? Get Access to Factory Service Manuals

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Get the C191B Lexus code diagnosed by a professional: Find a repair shop in your area

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 C191B Lexus Code

1. What are the common symptoms of OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- Common symptoms include erratic or non-functional speedometer, ABS warning light, traction control issues, and potential transmission shifting problems.

2. What are the possible causes of OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- The code may be triggered by a faulty wheel speed sensor, damaged wiring or connectors, a malfunctioning ABS module, or issues with the vehicle's stability control system.

3. How can I diagnose the OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- Diagnose the code by inspecting the wheel speed sensors, checking the wiring and connectors for damage, scanning the ABS module for related fault codes, and testing the stability control system.

4. Can a DIY enthusiast repair OBDII code C191B (Lexus for Rear Vehicle Speed Signal?

- While basic inspections like checking connections and sensor condition can be done DIY, repairing the underlying issue may require specialized tools and expertise. Professional diagnosis is recommended.

5. Is it safe to continue driving with OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- It is not recommended to drive with this code active, as it can affect the vehicle's stability control system, ABS, and transmission operation. Prompt diagnosis and repair are advised.

6. How much does it typically cost to repair OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- The cost of repair can vary depending on the underlying issue. Simple fixes like sensor replacement may cost a couple of hundred dollars, while more complex repairs involving modules can be more expensive.

7. Can weather conditions affect the triggering of OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- Extreme weather conditions, such as heavy rain or snow, can potentially worsen the symptoms associated with this code by affecting sensor readings and causing electrical issues.

8. Will resetting the OBDII code C191B (Lexus) for Rear Vehicle Speed Signal make it go away permanently?

- Simply clearing the code without addressing the underlying issue will not permanently resolve the problem. The code is likely to reappear until the root cause is identified and fixed.

9. Are there any recalls or service bulletins related to OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- It's advisable to check with Lexus dealership or online resources for any recalls or service bulletins related to this specific OBDII code to see if there are known issues or remedies provided by the manufacturer.

10. Can a bad wheel alignment cause OBDII code C191B (Lexus) for Rear Vehicle Speed Signal?

- While a bad wheel alignment itself may not directly cause this code, it can exacerbate issues related to speed sensor readings and stability control systems, potentially leading to the trigger of the code.