OBD Guide
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U11D0

Lost Ignition Key Status Message

U11D0 is an OBD-II diagnostic trouble code meaning: Lost Ignition Key Status Message. Common causes: low battery in key fob, damage to the key reader antenna. Estimated repair cost: $6–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–167 (est.)

Symptoms

  • Engine won't start
  • The immobilizer indicator is flashing
  • 'Key not detected' message on the dashboard
  • The car goes into emergency mode
  • Problems with keyless entry

Causes

  • Low battery in key fob
  • Damage to the key reader antenna
  • Immobilizer module malfunction
  • Problems with the CAN bus
  • Mechanical damage to the key

How to Fix

  1. Check the battery in the key fob and replace if necessary
  2. Diagnose the reader antenna around the ignition switch
  3. Check the integrity of the CAN bus and connections
  4. Scan the immobilizer module for errors
  5. Repair only from an authorized dealer

Related codes

U11D1U11D2B3055

FAQ

What does the U11D0 code mean?

U11D0 is an OBD-II diagnostic trouble code that indicates: Lost Ignition Key Status Message

What causes a U11D0 error code?

The most common causes of U11D0 include: Low battery in key fob; Damage to the key reader antenna; Immobilizer module malfunction; Problems with the CAN bus.

How do I fix a U11D0 diagnostic trouble code?

To fix U11D0: Check the battery in the key fob and replace if necessary. Diagnose the reader antenna around the ignition switch. Check the integrity of the CAN bus and connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U11D0?

Yes, but get it checked soon

How much does it cost to fix U11D0?

The estimated repair cost for U11D0 is $6–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat