Toyota RAV4
U1123
The U1123 code in a 2013-2018 Toyota RAV4 indicates a loss of communication with the vehicle's Hybrid Vehicle Control ECU (HV ECU), which can affect various electronic systems.
1 SolutionU-CodeNetwork
U
Error Code Type
Network
Components
1 affected
Electrical
Symptoms
5 common
- •Check engine light illuminated
- •Inoperative hybrid system components
- •Erratic or non-functioning dashboard gauges
- +2 more
Most Affected Generations
1 generation
XA40
1
Top Affected Components
1 component
Electrical
1
Severity Levels
1 level
medium
1
Quick Facts
1
Total Solutions
1
Affected Components
5
Common Symptoms
1
Generations
All Solutions
Showing 1 of 1 solution for error code U1123 across all generations.