OBD Guide
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B160B

Panel Dimmer Input Circuit High

B160B is an OBD-II diagnostic trouble code meaning: Panel Dimmer Input Circuit High. Common causes: short circuit in wiring harness, dimmer malfunction. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Incorrect operation of the dashboard backlight
  • Spontaneous changes in display brightness
  • No response to brightness adjustment
  • Backlight blinking

Causes

  • Short circuit in wiring harness
  • Dimmer malfunction
  • Problems with the instrument cluster control module
  • Corrosion or poor contact in connectors
  • Fuse box malfunction

How to Fix

  1. Check the integrity of the wiring harness in the brightness control circuit section
  2. Test the brightness control with a multimeter
  3. Check contacts and connectors for oxidation
  4. Scan other modules for related errors
  5. If necessary, replace faulty components

Related codes

B160AB160CU0155

FAQ

What does the B160B code mean?

B160B is an OBD-II diagnostic trouble code that indicates: Panel Dimmer Input Circuit High

What causes a B160B error code?

The most common causes of B160B include: Short circuit in wiring harness; Dimmer malfunction; Problems with the instrument cluster control module; Corrosion or poor contact in connectors.

How do I fix a B160B diagnostic trouble code?

To fix B160B: Check the integrity of the wiring harness in the brightness control circuit section. Test the brightness control with a multimeter. Check contacts and connectors for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B160B?

Limited driving only, diagnose soon

How much does it cost to fix B160B?

The estimated repair cost for B160B is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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