OBD Guide
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U1223

Invalid Or Missing Data For Interior Lamps

U1223 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Interior Lamps. Common causes: door sensor malfunction, wiring harness problems. Estimated repair cost: $6–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Incorrect operation of interior lighting
  • The backlight turns on/off randomly
  • Lack of response to door opening
  • Flashing lamps when the engine is running

Causes

  • Door sensor malfunction
  • Wiring Harness Problems
  • Oxidation of contacts
  • Body control module failure
  • Software error

How to Fix

  1. Check the operation of the door sensors
  2. Inspect the wiring harness for damage
  3. Clean connector contacts
  4. Scan Body Control Module
  5. Update software if necessary

Related codes

U1221U1222U1224

FAQ

What does the U1223 code mean?

U1223 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Interior Lamps

What causes a U1223 error code?

The most common causes of U1223 include: Door sensor malfunction; Wiring Harness Problems; Oxidation of contacts; Body control module failure.

How do I fix a U1223 diagnostic trouble code?

To fix U1223: Check the operation of the door sensors. Inspect the wiring harness for damage. Clean connector contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1223?

Yes, but get it checked soon

How much does it cost to fix U1223?

The estimated repair cost for U1223 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat