OBD Guide
ENFRDEESPT

B127A

Auxiliary Video Input Signal Circuit

B127A is an OBD-II diagnostic trouble code meaning: Auxiliary Video Input Signal Circuit. Common causes: damaged video input cable, poor contact in the connector. Estimated repair cost: $6–111.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–111 (est.)

Symptoms

  • Auxiliary video input does not work
  • Distorted image from external source
  • Error message on display

Causes

  • Damaged video input cable
  • Poor contact in the connector
  • Head unit malfunction
  • Wiring Harness Problems

How to Fix

  1. Check the integrity of the video input cables
  2. Inspect and clean the connector contacts
  3. Check connections in wiring harness
  4. Test the head unit on another car
  5. Update multimedia system software

FAQ

What does the B127A code mean?

B127A is an OBD-II diagnostic trouble code that indicates: Auxiliary Video Input Signal Circuit

What causes a B127A error code?

The most common causes of B127A include: Damaged video input cable; Poor contact in the connector; Head unit malfunction; Wiring Harness Problems.

How do I fix a B127A diagnostic trouble code?

To fix B127A: Check the integrity of the video input cables. Inspect and clean the connector contacts. Check connections in wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B127A?

Yes, but get it checked soon

How much does it cost to fix B127A?

The estimated repair cost for B127A is $6–111. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat