u1090 invalid or missing data for non legislated diagnostics
OBD2 Code: U1090
Description: Invalid or Missing Data for Non-Legislated Diagnostics
Definition: This code indicates that there is a communication issue between the vehicle’s control modules, specifically related to non-legislated diagnostic data. It suggests that one or more modules are not sending or receiving the expected data correctly.
U1090 – Invalid or Missing Data for Non-Legistlated Diagnostics
Severity: Medium
Common Causes
U1090 – Invalid or Missing Data for Non-Legistlated Diagnostics
Common Causes:
- Faulty wiring or connections in the diagnostic system
- Interference from aftermarket electronic devices
- Software issues in the vehicle’s control module
- Incorrect data input during diagnostics testing
Common Misdiagnosis
OBD2 Code: U1090
Description: Invalid or Missing Data for Non-Legislated Diagnostics
Common Misdiagnosis: Faulty control module replacement without verifying wiring issues or communication faults.
Common Diagnostic Steps
OBD2 Code: U1090 – Invalid or Missing Data for Non-Legislated Diagnostics
- Check for Other Codes:
- Scan the vehicle’s computer system for any additional trouble codes that may be present.
- Inspect Wiring and Connectors:
- Visually inspect all related wiring and connectors for signs of damage, corrosion, or disconnection.
- Verify Communication Network Integrity:
- Use a diagnostic tool to check the integrity of the communication network (CAN bus) between modules.
- Test Module Functionality:
- If possible, test the functionality of the module(s) involved in non-legislated diagnostics to ensure they are operating correctly.
- Update Software/Calibration:
- If applicable, update the software or calibration files for the affected module(s).
Please note that these steps are general guidelines. Specific vehicles may require different procedures based on their unique systems and configurations.