OBD Guide
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B1623

Lamp Keypad Output Circuit Failure

B1623 is an OBD-II diagnostic trouble code meaning: Lamp Keypad Output Circuit Failure. Common causes: broken or damaged wiring harness, backlight module malfunction. Estimated repair cost: $22–111.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • The backlight of the buttons on the panel does not work
  • Backlight flashing
  • No response to brightness adjustment

Causes

  • Broken or damaged wiring harness
  • Backlight module malfunction
  • Power or grounding problems
  • Oxidation of contacts

How to Fix

  1. Check wiring harness for damage
  2. Check the integrity of the backlight control circuit
  3. Test the backlight module
  4. Clean or replace oxidized contacts

Related codes

B1621B1622

FAQ

What does the B1623 code mean?

B1623 is an OBD-II diagnostic trouble code that indicates: Lamp Keypad Output Circuit Failure

What causes a B1623 error code?

The most common causes of B1623 include: Broken or damaged wiring harness; Backlight module malfunction; Power or grounding problems; Oxidation of contacts.

How do I fix a B1623 diagnostic trouble code?

To fix B1623: Check wiring harness for damage. Check the integrity of the backlight control circuit. Test the backlight module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1623?

Yes, but get it checked soon

How much does it cost to fix B1623?

The estimated repair cost for B1623 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat