OBD Guide
ENFRDEESPT

B2647

Ambient Light Sensor Circuit

B2647 is an OBD-II diagnostic trouble code meaning: Ambient Light Sensor Circuit. Common causes: open or short circuit in wiring harness, poor contact in the sensor connector. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of automatic headlights
  • Dashboard brightness adjustment malfunction
  • Error message on the dashboard

Causes

  • Open or short circuit in wiring harness
  • Poor contact in the sensor connector
  • Ambient light sensor malfunction
  • Problems with the lighting control unit

How to Fix

  1. Check the integrity of the wiring harness and connectors
  2. Test the ambient light sensor
  3. Replace sensor if necessary
  4. Check and update the control unit software

Related codes

B2645B2646B2648

FAQ

What does the B2647 code mean?

B2647 is an OBD-II diagnostic trouble code that indicates: Ambient Light Sensor Circuit

What causes a B2647 error code?

The most common causes of B2647 include: Open or short circuit in wiring harness; Poor contact in the sensor connector; Ambient light sensor malfunction; Problems with the lighting control unit.

How do I fix a B2647 diagnostic trouble code?

To fix B2647: Check the integrity of the wiring harness and connectors. Test the ambient light sensor. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2647?

Limited driving only, diagnose soon

How much does it cost to fix B2647?

The estimated repair cost for B2647 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat