Toyota Highlander
P0174
The P0174 code indicates a "System Too Lean (Bank 2)" error in a 2020-present Toyota Highlander Fourth Generation. This means that the engine control module (ECM) has detected that the air-fuel mixture is too lean on bank 2 of the engine.
44 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
2 affected
EngineFuel System
Symptoms
10 common
- •Check engine light illuminated
- •Rough idle or stalling
- •Decreased engine power
- +7 more
Most Affected Generations
2 generations
XU70
29
XU50
15
Top Affected Components
2 components
Engine
42
Fuel System
2
Severity Levels
2 levels
high
27
medium
17
Quick Facts
44
Total Solutions
2
Affected Components
10
Common Symptoms
2
Generations
All Solutions
Showing 44 of 44 solutions for error code P0174 across all generations.