OBD Guide
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U1087

Invalid Or Missing Data For Primary Id

U1087 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: damage to the can bus wiring harness, corroded or oxidized connectors. Estimated repair cost: $17–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Malfunctions of electronic systems
  • Lost connection with some modules
  • Unstable engine operation
  • Diagnostic problems

Causes

  • Damage to the CAN bus wiring harness
  • Corroded or oxidized connectors
  • Malfunction of one of the electronic modules
  • Problems with module power supply
  • Software failures in the ECU

How to Fix

  1. Check the integrity of the CAN bus wiring harness
  2. Inspect and clean all connectors
  3. Check power and ground of modules
  4. Read error codes from all available modules
  5. If necessary, replace the faulty module

Related codes

U1000U0100U0121

FAQ

What does the U1087 code mean?

U1087 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id

What causes a U1087 error code?

The most common causes of U1087 include: Damage to the CAN bus wiring harness; Corroded or oxidized connectors; Malfunction of one of the electronic modules; Problems with module power supply.

How do I fix a U1087 diagnostic trouble code?

To fix U1087: Check the integrity of the CAN bus wiring harness. Inspect and clean all connectors. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1087?

Yes, but get it checked soon

How much does it cost to fix U1087?

The estimated repair cost for U1087 is $17–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat