AutoCodes – GMC – B133B 2016 GMC Sierra

B133B 2016 GMC Sierra 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 2016 GMC Sierra 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 317

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 2016 GMC Sierra 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 2016 GMC Sierra - Reverse Gear Status Not Plausible - AutoCodes.com — B133B 2016 GMC Sierra Code - Reverse Gear Status Not Plausible

What does this mean?

What are the Possible Causes of the DTC B133B 2016 GMC Sierra?

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 2016 GMC Sierra?

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 2016 GMC Sierra 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 2016 GMC Sierra code?

Need more information on how to fix the B133B 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code B133B on a 2016 GMC Sierra?

The common symptoms may include issues with shifting into reverse gear, erratic behavior in reverse, or the reverse gear not engaging properly.

2. What does the OBDII code B133B mean for a 2016 GMC Sierra?

The code B133B indicates a "Reverse Gear Status Not Plausible" error, suggesting a problem with the reverse gear functionality in the vehicle.

3. What are the possible causes of OBDII code B133B on a 2016 GMC Sierra?

Possible causes may include faulty transmission sensors, wiring issues, a malfunctioning transmission control module, or mechanical problems within the transmission system.

4. How can I diagnose the OBDII code B133B on my 2016 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the transmission sensors and wiring, checking the transmission fluid level, and performing a thorough visual inspection of the transmission components.

5. Can I continue driving my 2016 GMC Sierra with the OBDII code B133B?

It is not recommended to drive the vehicle with this code present, as it may lead to further transmission damage or safety hazards due to potential issues with reverse gear engagement.

6. How can I reset the OBDII code B133B on my 2016 GMC Sierra?

Resetting the code typically involves using an OBDII scanner to clear the error code after identifying and addressing the root cause of the issue.

7. Is it safe to attempt DIY repairs for the OBDII code B133B on a 2016 GMC Sierra?

While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, complex transmission repairs should be handled by experienced professionals to ensure proper diagnosis and repair.

8. What are the repair options for addressing OBDII code B133B on a 2016 GMC Sierra?

Repair options may include replacing faulty sensors, repairing damaged wiring, recalibrating the transmission control module, or conducting necessary transmission repairs as per the diagnosis.

9. How much does it typically cost to fix the OBDII code B133B on a 2016 GMC Sierra?

The cost of repairs can vary depending on the specific underlying issue, parts needed for replacement, labor costs, and whether the repairs are done at a dealership or an independent repair shop.

10. Can weather conditions affect the occurrence of OBDII code B133B on a 2016 GMC Sierra?

Extreme weather conditions like temperature fluctuations or moisture exposure may potentially impact the transmission system and contribute to the occurrence of the reverse gear error indicated by code B133B.