AutoCodes – Chevrolet – B127B 2016 Chevrolet Silverado

B127B 2016 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 2016 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 431

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 2016 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 2016 Chevrolet Silverado - Rearview Camera Input Signal Circuit - AutoCodes.com — B127B 2016 Chevrolet Silverado Code - Rearview Camera Input Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B127B 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B127B in a 2016 Chevrolet Silverado related to the Rearview Camera Input Signal Circuit?

The common symptoms include a malfunctioning rearview camera, a blank or distorted display on the screen, and intermittent camera operation.

2. What are the possible causes of OBDII code B127B in a 2016 Chevrolet Silverado?

Possible causes may include a faulty rearview camera, damaged wiring or connectors in the camera circuit, a defective camera control module, or a software issue.

3. How can I diagnose the issue causing OBDII code B127B in my 2016 Chevrolet Silverado?

You can start by visually inspecting the rearview camera and its connections for any visible damage. Using a multimeter, test the camera circuit for continuity and voltage to identify any potential faults.

4. Are there any DIY repair tips for fixing OBDII code B127B in a 2016 Chevrolet Silverado?

If the issue is with the rearview camera itself, replacing it with a new unit may resolve the problem. Ensure all connections are secure and free of corrosion to prevent future issues.

5. Can a software update fix OBDII code B127B in a 2016 Chevrolet Silverado?

In some cases, a software update provided by the manufacturer may address issues related to the rearview camera input signal circuit. It's advisable to check for any available updates from Chevrolet.

6. Is it safe to continue driving my 2016 Chevrolet Silverado with OBDII code B127B active?

While the vehicle may still be operational, it's recommended to address the issue promptly to ensure proper functionality of the rearview camera system, which enhances safety while reversing.

7. What specialized tools may be needed to troubleshoot OBDII code B127B in a 2016 Chevrolet Silverado?

Depending on the diagnosis, tools such as a multimeter, wiring diagrams, and potentially a scan tool capable of accessing specific modules in the vehicle may be required.

8. Can extreme weather conditions affect the rearview camera system and trigger OBDII code B127B in a 2016 Chevrolet Silverado?

Yes, extreme temperatures or moisture exposure can impact the performance of the rearview camera and its components, leading to faults in the input signal circuit.

9. How much does it typically cost to repair OBDII code B127B in a 2016 Chevrolet Silverado at a dealership or repair shop?

The repair costs can vary based on the exact cause of the issue, but it's advisable to get a diagnostic assessment first to determine the specific repairs needed and associated costs.

10. What steps should I take if I've already replaced the rearview camera and the issue causing OBDII code B127B in my 2016 Chevrolet Silverado persists?

If replacing the rearview camera did not resolve the problem, consider seeking assistance from a qualified technician to further diagnose the wiring, connectors, or control module associated with the camera circuit.