U1144
Invalid Or Missing Data For Primary Id
U1144 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: broken or damaged wires in the can bus, connector problems or contact corrosion. Estimated repair cost: $6–167.
Symptoms
- Check Engine light comes on
- Incorrect operation of some vehicle systems
- Gear shifting problems (if the gearbox is affected)
- Reduced engine power
- Errors in the operation of electronic systems
Causes
- Broken or damaged wires in the CAN bus
- Connector problems or contact corrosion
- Malfunction of one of the electronic modules
- Software glitch in the communication system
- Problems with module power supply
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean all connectors and contacts
- Check power supply and grounding of modules
- Read error codes from all modules for accurate diagnostics
- If necessary, reflash or replace the faulty module
Related codes
FAQ
What does the U1144 code mean?
U1144 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1144 error code?
The most common causes of U1144 include: Broken or damaged wires in the CAN bus; Connector problems or contact corrosion; Malfunction of one of the electronic modules; Software glitch in the communication system.
How do I fix a U1144 diagnostic trouble code?
To fix U1144: Check the integrity of the CAN bus wiring. Inspect and clean all connectors and contacts. Check power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1144?
Yes, but get it checked soon
How much does it cost to fix U1144?
The estimated repair cost for U1144 is $6–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat