U1126
Invalid Or Missing Data For Primary Id
U1126 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: malfunction of one of the electronic modules, damage to can bus wiring. Estimated repair cost: $6–278.
Symptoms
- The Check Engine light comes on
- Incorrect operation of some vehicle systems
- Intermittent electronic malfunctions
- Limitation of functionality (limp mode)
Causes
- Malfunction of one of the electronic modules
- Damage to CAN bus wiring
- Oxidation or damage to connectors
- Problems with module power supply
- Software failure in the electronic control unit
How to Fix
- Conduct CAN bus diagnostics using an oscilloscope
- Check connectors and integrity of wiring between modules
- Read error codes from all available modules
- If necessary, reflash the problematic module
- Replace the faulty electronic unit if necessary
Related codes
FAQ
What does the U1126 code mean?
U1126 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1126 error code?
The most common causes of U1126 include: Malfunction of one of the electronic modules; Damage to CAN bus wiring; Oxidation or damage to connectors; Problems with module power supply.
How do I fix a U1126 diagnostic trouble code?
To fix U1126: Conduct CAN bus diagnostics using an oscilloscope. Check connectors and integrity of wiring between modules. Read error codes from all available modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1126?
Yes, but get it checked soon
How much does it cost to fix U1126?
The estimated repair cost for U1126 is $6–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat