B127B on Chevrolet
Rearview Camera Input Signal Circuit
B127B on Chevrolet vehicles indicates rearview camera input signal circuit. Au7o has documented this code across 1 Chevrolet model — most commonly on Trax. B127B is a manufacturer-specific body code that generally indicates a problem with the rearview (backup) camera input signal circuit, meaning the display/control module is not receiving a proper video signal from the camera. The result is typically a blank, distorted, or missing rear camera image. It does not affect engine performance or drivability but reduces rear visibility assistance, so caution is advised when reversing. Exact meaning can vary by maker, so confirm with vehicle-specific data.
Common Causes of B127B
- •Faulty rearview camera
- •Water intrusion or physical damage to the camera
- •Damaged or corroded camera wiring/connector
- •Open or short in the camera video signal circuit
- •Faulty display or infotainment/control module
- •Loss of power or ground to the camera
B127B on Chevrolet by Model
Chevrolet Trax(1 issue)
- Rearview Camera Image Missing, Delayed, or Blue/Black Screen2024-2025
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.
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View B127B across all makes →Frequently Asked Questions
What does B127B mean on Chevrolet?▼
B127B stands for "Rearview Camera Input Signal Circuit." B127B is a manufacturer-specific body code that generally indicates a problem with the rearview (backup) camera input signal circuit, meaning the display/control module is not receiving a proper video signal from the camera. The result is typically a blank, distorted, or missing rear camera image. It does not affect engine performance or drivability but reduces rear visibility assistance, so caution is advised when reversing. Exact meaning can vary by maker, so confirm with vehicle-specific data. On Chevrolet specifically, this code is documented across 1 model.
What causes B127B on Chevrolet vehicles?▼
Common causes on Chevrolet: Faulty rearview camera, Water intrusion or physical damage to the camera, Damaged or corroded camera wiring/connector, Open or short in the camera video signal circuit, Faulty display or infotainment/control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B127B on a Chevrolet?▼
Repair costs vary widely depending on the root cause and specific Chevrolet model.
Which Chevrolet models have B127B documented?▼
Au7o has documented B127B on 1 Chevrolet model: Trax.