B127E on Chevrolet: How to Diagnose & Fix
Front Video Display Output Signal Malfunction
1 Chevrolet model · 1 documented issue · 1 critical
B127E on Chevrolet by model: symptoms, diagnosis and fix
Multiple owners have reported the rearview camera failing to display when shifting into reverse, showing a blank/blue/black screen, or appearing only after a long delay. This issue is documented in owner complaints and overlaps with infotainment/display faults, but the safety impact is distinct because the camera is federally required equipment. In some cases the problem is intermittent, making it difficult to reproduce at the dealer.
Common Symptoms
- no rear camera image in reverse
- blue screen when backing up
- black screen when shifting into reverse
- camera image appears after several seconds
- guidelines missing or frozen
How to Fix
Check for related GM service bulletins, software updates, and camera/radio module faults. Diagnosis should include verifying camera power/ground, coax or video signal integrity, and whether the issue is isolated to the camera or part of a broader infotainment dropout. If software updates do not resolve it, dealers may replace the camera or radio/display components depending on test results.
Sources for this issue (1)
B127E code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B127E mean on a Chevrolet?
B127E stands for "Front Video Display Output Signal Malfunction." B127E is a manufacturer-specific body code that generally indicates a malfunction in the front video display output signal, meaning the control module detected a fault in the signal driving the front display screen. Symptoms include a blank, flickering, or distorted front display affecting navigation, camera, or entertainment views. On some GM applications it can set falsely while certain video media is playing on the front screen. It is a comfort/convenience issue and does not affect drivability; confirm with vehicle-specific data. On Chevrolet it is documented across 1 model: Trax.
What are the most common causes of B127E?
The most common causes of B127E are: Faulty front display unit, Damaged or loose wiring between the display and module, Open or short in the video output circuit, Faulty infotainment/head unit or control module, Software/configuration fault, False set during front-screen media playback (some GM). The specific cause varies by vehicle.
How much does it cost to fix B127E on a Chevrolet?
Repair costs vary widely with the root cause and Chevrolet model; each issue on this page carries its own estimate where one is published.
Looking for B127E on a different make?
View B127E across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.