OBD Guide
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B127B

Rearview Camera Input Signal Circuit

B127B is an OBD-II diagnostic trouble code meaning: Rearview Camera Input Signal Circuit. Common causes: damage to the camera wiring harness, rear view camera malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • No image from the rear view camera
  • Distorted camera image
  • Error message on display

Causes

  • Damage to the camera wiring harness
  • Rear view camera malfunction
  • Poor contact in connectors
  • Software glitch in the camera module

How to Fix

  1. Check wiring harness for damage
  2. Check the contacts in the camera connectors
  3. Check the operation of the rear view camera
  4. If necessary, replace the camera or wiring harness
  5. Update or reflash camera module software

FAQ

What does the B127B code mean?

B127B is an OBD-II diagnostic trouble code that indicates: Rearview Camera Input Signal Circuit

What causes a B127B error code?

The most common causes of B127B include: Damage to the camera wiring harness; Rear view camera malfunction; Poor contact in connectors; Software glitch in the camera module.

How do I fix a B127B diagnostic trouble code?

To fix B127B: Check wiring harness for damage. Check the contacts in the camera connectors. Check the operation of the rear view camera. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B127B?

Limited driving only, diagnose soon

How much does it cost to fix B127B?

The estimated repair cost for B127B is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat