top of page
Toyota U1401 Code – CAN Bus Invalid Data
Limited
Safe to drive :
Toyota vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other brands.
Medium
Severity level :
When Does This Code Appear on the Vehicles
Toyota U1401 appears when BCM reports invalid data over CAN network.
What This Code means on the Vehicles
Toyota-specific invalid module data reported to network.
Why This is different from a generic OBD2 Code
Generic OBD-II scanners cannot report invalid CAN bus data from OEM modules.
Common Situations That Trigger This Code
BCM firmware mismatch; Wiring issues; Faulty module.
What Will NOT Fix This Code
Replacing unrelated sensors; Ignoring CAN bus alert.
How to Clear This Code on Vehicles
Inspect BCM and wiring; clear via Techstream.
Related Manufacturer Specific Codes
Toyota U1400; Toyota U1402
bottom of page