AutoCodes – Chevrolet – B133B Chevrolet

B133B Chevrolet Code - Reverse Gear Status Not Plausible

Quick Answer

The Human Machine Interface Control Module receives a signal from the Human Machine Interface Control Module Bypass Module indicating reverse gear status. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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: B133B Chevrolet indicates Reverse Gear Status Not Plausible.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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 1,666

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 Apr 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B133B Chevrolet Description

The Human Machine Interface Control Module receives a signal from the Human Machine Interface Control Module Bypass Module indicating reverse gear status. The reverse gear status is used to determine when to activate the rearview camera display. The Human Machine Interface Control Module also receives another reverse gear status message via serial data. The Human Machine Interface Control Module compares the two serial data messages to verify the plausibility of the messages. The Diagnostic Trouble Code (DTC) will be set when the Human Machine Interface Control Module has determined the reverse message states do not match and are therefore not plausible.

OBDII Code B133B Chevrolet - Reverse Gear Status Not Plausible - AutoCodes.com — B133B Chevrolet Code - Reverse Gear Status Not Plausible

What does this mean?

What are the Possible Causes of the DTC B133B Chevrolet?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection
Faulty Human Machine Interface Control Module

How to Fix the DTC B133B Chevrolet?

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 B133B Chevrolet 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 B133B Chevrolet code?

Need more information on how to fix the B133B Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B133B Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B133B 2014 Chevrolet Silverado — Reverse Gear Status Not Plausible
B133B 2015 Chevrolet Silverado — Reverse Gear Status Not Plausible
B133B 2016 Chevrolet Silverado — Reverse Gear Status Not Plausible
B133B 2017 Chevrolet Silverado — Reverse Gear Status Not Plausible
B133B 2018 Chevrolet Silverado — Reverse Gear Status Not Plausible

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 B133B Chevrolet Code

1. What does the OBDII code B133B Chevrolet mean?

The code B133B represents a Reverse Gear Status Not Plausible error in a Chevrolet vehicle.

2. What are the common symptoms of OBDII code B133B in a Chevrolet?

Common symptoms include issues with shifting into reverse gear, erratic transmission behavior, and illuminated warning lights on the dashboard.

3. What are the possible causes of the B133B code in a Chevrolet?

Possible causes include faulty reverse gear position sensor, wiring issues, transmission control module problems, or mechanical issues within the transmission.

4. How can I diagnose the B133B code in my Chevrolet?

Diagnosis involves using a diagnostic scanner to retrieve the trouble codes, checking the reverse gear position sensor for proper operation, inspecting the wiring for any damage, and performing a thorough transmission system check.

5. Can I still drive my Chevrolet with the B133B code present?

It is not recommended to drive the vehicle with the B133B code as it can lead to further transmission damage and safety issues. Have the problem diagnosed and repaired as soon as possible.

6. How can I repair the Reverse Gear Status Not Plausible issue in my Chevrolet?

Repairing the B133B code typically involves replacing a faulty reverse gear position sensor, repairing any damaged wiring, resetting the transmission control module, or addressing any mechanical issues in the transmission.

7. Is it possible to clear the B133B code in a Chevrolet without fixing the underlying issue?

Clearing the code without addressing the root cause may temporarily turn off the warning light, but the issue will likely reoccur. It is important to fix the problem to prevent further issues.

8. Can a DIY enthusiast fix the B133B code in a Chevrolet?

While some DIY enthusiasts may be able to address simple causes like damaged wiring, diagnosing and repairing transmission-related issues should be left to experienced mechanics or professionals.

9. How much does it typically cost to repair the B133B code in a Chevrolet?

The cost of repairs for the B133B code can vary depending on the specific cause of the issue, labor rates in your area, and whether any parts need replacement. It is advisable to get a few quotes from different mechanics.

10. Can regular maintenance prevent the B133B code from occurring in my Chevrolet?

Regular maintenance, including transmission fluid checks and servicing, can help prevent some issues that may lead to the B133B code. However, some causes may be due to sensor failures or wiring issues that are not preventable through routine maintenance.