OBD Guide
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U1054

Invalid or Missing Data For Primary Id

U1054 is an OBD-II diagnostic trouble code meaning: Invalid or Missing Data For Primary Id. Common causes: damage to the can bus wiring harness, main module malfunction. Estimated repair cost: $17–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–111 (est.)

Symptoms

  • Check Engine light comes on
  • There may be malfunctions in various vehicle systems
  • Loss of communication between modules
  • Unstable engine operation
  • Diagnostic problems

Causes

  • Damage to the CAN bus wiring harness
  • Main module malfunction
  • Software problems
  • Contact corrosion
  • Power outages

How to Fix

  1. Check the integrity of the CAN bus wiring harness
  2. Check connections and contacts
  3. Scan all modules for errors
  4. Update or reflash module software
  5. Replace the faulty module if necessary

Related codes

U1000U1055U1064

FAQ

What does the U1054 code mean?

U1054 is an OBD-II diagnostic trouble code that indicates: Invalid or Missing Data For Primary Id

What causes a U1054 error code?

The most common causes of U1054 include: Damage to the CAN bus wiring harness; Main module malfunction; Software problems; Contact corrosion.

How do I fix a U1054 diagnostic trouble code?

To fix U1054: Check the integrity of the CAN bus wiring harness. Check connections and contacts. Scan all modules for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1054?

Yes, but get it checked soon

How much does it cost to fix U1054?

The estimated repair cost for U1054 is $17–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat