OBD Guide
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U1099

Loss Of Head-Up Display Communications

U1099 is an OBD-II diagnostic trouble code meaning: Loss Of Head-Up Display Communications. Common causes: broken or damaged wires, oxidation of contacts in connectors. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Head-up display (HUD) does not work
  • Error message on the dashboard
  • HUD is intermittent
  • Missing important information on the windshield

Causes

  • Broken or damaged wires
  • Oxidation of contacts in connectors
  • HUD control unit malfunction
  • Module power problems
  • Software error in the system

How to Fix

  1. Check the integrity of the wiring harness to the HUD
  2. Clean contacts in connectors
  3. Check fuses and relays
  4. Scan other modules for errors
  5. Update HUD module software

Related codes

U1000U1010U1100

FAQ

What does the U1099 code mean?

U1099 is an OBD-II diagnostic trouble code that indicates: Loss Of Head-Up Display Communications

What causes a U1099 error code?

The most common causes of U1099 include: Broken or damaged wires; Oxidation of contacts in connectors; HUD control unit malfunction; Module power problems.

How do I fix a U1099 diagnostic trouble code?

To fix U1099: Check the integrity of the wiring harness to the HUD. Clean contacts in connectors. Check fuses and relays. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1099?

Yes, but get it checked soon

How much does it cost to fix U1099?

The estimated repair cost for U1099 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat