U1127
Invalid Or Missing Data For Primary Id
U1127 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Primary Id. Common causes: broken or damaged can bus wires, oxidation of contacts in connectors. Estimated repair cost: $6–56.
Symptoms
- Check Engine Light Is On
- There may be malfunctions in various vehicle systems
- Loss of data on the dashboard
- Incorrect operation of electronic assistants
Causes
- Broken or damaged CAN bus wires
- Oxidation of contacts in connectors
- Malfunction of one of the ECUs
- Software failure in the module
- Problems with CAN bus power supply
How to Fix
- Check the integrity of the CAN bus with a multimeter
- Inspect and clean all connectors in the circuit
- Check CAN bus power supply
- Read error codes from all modules
- If necessary, reflash the problematic module
Related codes
FAQ
What does the U1127 code mean?
U1127 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Primary Id
What causes a U1127 error code?
The most common causes of U1127 include: Broken or damaged CAN bus wires; Oxidation of contacts in connectors; Malfunction of one of the ECUs; Software failure in the module.
How do I fix a U1127 diagnostic trouble code?
To fix U1127: Check the integrity of the CAN bus with a multimeter. Inspect and clean all connectors in the circuit. Check CAN bus power supply. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1127?
Yes, but get it checked soon
How much does it cost to fix U1127?
The estimated repair cost for U1127 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat