OBD Guide
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U1174

Invalid Or Missing Data For Primary Id

U1174 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: malfunction of the main module (for example, ecu), open or short circuit in the can bus. Estimated repair cost: $6–167.

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

Symptoms

  • Check Engine Light Is On
  • Some electronic systems do not work
  • Dashboard malfunctions
  • Problems starting the engine
  • Errors in other systems

Causes

  • Malfunction of the main module (for example, ECU)
  • Open or short circuit in the CAN bus
  • Poor contact in connectors
  • Module power problems
  • Software error

How to Fix

  1. Check the integrity of the CAN bus
  2. Check power and ground of the main module
  3. Inspect connectors for oxidation
  4. Count errors of all modules
  5. If necessary, replace the faulty module

Related codes

U0100U0121U0155

FAQ

What does the U1174 code mean?

U1174 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id

What causes a U1174 error code?

The most common causes of U1174 include: Malfunction of the main module (for example, ECU); Open or short circuit in the CAN bus; Poor contact in connectors; Module power problems.

How do I fix a U1174 diagnostic trouble code?

To fix U1174: Check the integrity of the CAN bus. Check power and ground of the main module. Inspect connectors for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1174?

Yes, but get it checked soon

How much does it cost to fix U1174?

The estimated repair cost for U1174 is $6–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat