AutoCodes – Chevrolet – B127B 2015 Chevrolet Silverado

B127B 2015 Chevrolet Silverado Code - Rearview Camera Input Signal Circuit

Quick Answer

When the transmission is placed into R, a 12 V signal is sent to the Rearview Camera indicating that camera operation is requested. Common causes include Faulty Rearview Camera, Rearview Camera harness is open or shorted, Rearview Camera circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B127B 2015 Chevrolet Silverado indicates Rearview Camera Input Signal Circuit.
Common causes: Common causes include Faulty Rearview Camera, Rearview Camera harness is open or shorted, Rearview Camera circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 442

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B127B 2015 Chevrolet Silverado Description

When the transmission is placed into R, a 12 V signal is sent to the Rearview Camera indicating that camera operation is requested. Ignition voltage and ground are supplied to the Rearview Camera. The Rearview Camera sends a video image to the Human Machine Interface Control Module Bypass Module through a video signal + and a video signal − circuit. The Human Machine Interface Control Module Bypass Module passes the video image to Human Machine Interface Control Module via video signal + and a video signal − circuits. The Human Machine Interface Control Module Bypass Module is used to ensure the Human Machine Interface Control Module produces a quality rear vision camera image to be displayed on the Info Display Module when the vehicle is placed in reverse gear. In the event, the Human Machine Interface Control Module Bypass Module detects an issue with the camera image generated by the Human Machine Interface Control Module, such as black, solid color, frozen, or image other than the camera image, the Human Machine Interface Control Module Bypass Module will assume control of the image to the Info Display Module and displays a raw camera image with no park assist projection lines or object detection symbols for the entire reverse cycle.
The Human Machine Interface Control Module Bypass Module is part of the video signal + and a video signal − circuits path from the Rearview Camera to the Human Machine Interface Control Module as well as the digital Low Voltage Differential Signaling (LVDS) path (USB cable) between the Human Machine Interface Control Module and Info Display Module and needs to be active for either signal to be received by these modules. The Human Machine Interface Control Module Bypass Module is not connected to serial data and uses the reverse lamp voltage input to determine the vehicle gear state.
The Diagnostic Trouble Code (DTC) will be set when the video signal from the rearview camera has not been received by the Radio for 2.5 s.

OBDII Code B127B 2015 Chevrolet Silverado - Rearview Camera Input Signal Circuit - AutoCodes.com — B127B 2015 Chevrolet Silverado Code - Rearview Camera Input Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B127B 2015 Chevrolet Silverado?

Faulty Rearview Camera
Rearview Camera harness is open or shorted
Rearview Camera circuit poor electrical connection
Faulty Human Machine Interface Control Module
Faulty Info Display Module

How to Fix the DTC B127B 2015 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

A poor video image can be caused by ice, snow, and mud buildup on the lens of the Rearview Camera. Also, extreme lighting conditions can affect performance, such as operating in the dark or with bright sunlight shining on the camera. Extreme high or low temperatures can also affect image quality. An open or high resistance in the shield of the video signal circuit can also cause a distorted screen.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B127B 2015 Chevrolet Silverado 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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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 B127B 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B127B in a 2015 Chevrolet Silverado related to the Rearview Camera Input Signal Circuit?

- The common symptoms include a non-functioning or erratic display on the rearview camera screen, complete loss of the rearview camera feed, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B127B in a 2015 Chevrolet Silverado?

- Possible causes can include faulty wiring or connections in the rearview camera system, a malfunctioning rearview camera module, or issues with the camera itself.

3. How can I diagnose the source of the issue causing OBDII code B127B in my 2015 Chevrolet Silverado?

- Diagnosing the issue involves checking the wiring and connections in the rearview camera system, testing the rearview camera module, and inspecting the camera for any physical damage or malfunctions.

4. Can I repair the Rearview Camera Input Signal Circuit issue causing OBDII code B127B in my 2015 Chevrolet Silverado myself?

- Depending on your level of automotive expertise, you may be able to repair the issue yourself by checking and repairing any faulty wiring or connections, replacing the rearview camera module, or installing a new rearview camera.

5. Is it safe to drive my 2015 Chevrolet Silverado with OBDII code B127B related to the Rearview Camera Input Signal Circuit?

- It is generally safe to drive the vehicle, but it is recommended to address the issue promptly to ensure proper functionality of the rearview camera system, which enhances safety while reversing.

6. How much does it typically cost to repair OBDII code B127B in a 2015 Chevrolet Silverado?

- The cost of repair can vary depending on the exact cause of the issue. Simple fixes like repairing wiring may be inexpensive, while replacing the rearview camera module or camera itself can be pricier.

7. Can a malfunctioning rearview camera cause other problems in my 2015 Chevrolet Silverado besides triggering OBDII code B127B?

- Yes, a malfunctioning rearview camera can impact safety while reversing, reduce visibility, and potentially lead to accidents if not addressed promptly.

8. Are there any preventive measures I can take to avoid OBDII code B127B in my 2015 Chevrolet Silverado?

- Regularly inspecting the rearview camera system, ensuring proper connections, and keeping the camera clean can help prevent issues that may trigger this OBDII code.

9. How long does it typically take to repair OBDII code B127B related to the Rearview Camera Input Signal Circuit in a 2015 Chevrolet Silverado?

- The repair time can vary depending on the complexity of the issue. Simple fixes may take a short amount of time, while more involved repairs could require several hours.

10. Can OBDII code B127B in a 2015 Chevrolet Silverado be cleared/reset without addressing the underlying issue with the Rearview Camera Input Signal Circuit?

- While you can clear/reset the code temporarily, it will likely reappear until the root cause of the issue is identified and repaired.