OBD Guide
ENFRDEESPT

U1124

Invalid Or Missing Data For Primary Id

U1124 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: damage to the can bus or connectors, malfunction of one of the electronic modules. 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
  • There may be problems with the operation of systems that depend on data exchange
  • Reduced engine performance
  • Errors in the operation of other vehicle systems

Causes

  • Damage to the CAN bus or connectors
  • Malfunction of one of the electronic modules
  • Problems with module power supply
  • Corrosion or oxidation of contacts
  • Software error in the module

How to Fix

  1. Check the integrity of the CAN bus and connections
  2. Scan all modules for errors
  3. Check power supply and grounding of modules
  4. Update module software
  5. Replace the faulty module if necessary

Related codes

U1123U1125U1126

FAQ

What does the U1124 code mean?

U1124 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id

What causes a U1124 error code?

The most common causes of U1124 include: Damage to the CAN bus or connectors; Malfunction of one of the electronic modules; Problems with module power supply; Corrosion or oxidation of contacts.

How do I fix a U1124 diagnostic trouble code?

To fix U1124: Check the integrity of the CAN bus and connections. Scan all modules for errors. Check power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1124?

Yes, but get it checked soon

How much does it cost to fix U1124?

The estimated repair cost for U1124 is $17–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat