OBD Guide
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U1102

Invalid Or Missing Data For Primary Id

U1102 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: damage to the can bus, electronic 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 Is On
  • Incorrect operation of some vehicle systems
  • Possible problems starting the engine
  • Reduced engine power
  • Errors in other systems

Causes

  • Damage to the CAN bus
  • Electronic module malfunction
  • Wiring Harness Problems
  • Contact corrosion
  • Software error in the ECU

How to Fix

  1. Check CAN bus connections
  2. Diagnose all related modules
  3. Check the integrity of the wiring harnesses
  4. Clean contacts from corrosion
  5. Update ECU software

Related codes

U1101U1103U1104

FAQ

What does the U1102 code mean?

U1102 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id

What causes a U1102 error code?

The most common causes of U1102 include: Damage to the CAN bus; Electronic module malfunction; Wiring Harness Problems; Contact corrosion.

How do I fix a U1102 diagnostic trouble code?

To fix U1102: Check CAN bus connections. Diagnose all related modules. Check the integrity of the wiring harnesses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1102?

Yes, but get it checked soon

How much does it cost to fix U1102?

The estimated repair cost for U1102 is $17–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat