U1049
Invalid Or Missing Data For Primary Id
U1049 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: open or short circuit in the can bus, problems with power supply of electronic modules. Estimated repair cost: $6–167.
Symptoms
- Check Engine light comes on
- Malfunctions of various vehicle systems
- Lost communication with diagnostic tool
- Unstable engine operation
- Disabling comfort functions (heating, climate control)
Causes
- Open or short circuit in the CAN bus
- Problems with power supply of electronic modules
- Main ECU malfunction
- Corrosion of connectors
- Post-repair problems (incorrect connection)
How to Fix
- Check the integrity of the CAN bus (resistance, circuit)
- Diagnose the power supply of all modules
- Check connectors for corrosion and damage
- Scan all modules for additional errors
- Reflash modules if necessary
Related codes
FAQ
What does the U1049 code mean?
U1049 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1049 error code?
The most common causes of U1049 include: Open or short circuit in the CAN bus; Problems with power supply of electronic modules; Main ECU malfunction; Corrosion of connectors.
How do I fix a U1049 diagnostic trouble code?
To fix U1049: Check the integrity of the CAN bus (resistance, circuit). Diagnose the power supply of all modules. Check connectors for corrosion and damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1049?
Yes, but get it checked soon
How much does it cost to fix U1049?
The estimated repair cost for U1049 is $6–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat