Toyota Highlander
P0171
The P0171 code indicates a system lean condition 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, which can lead to performance issues and increased emissions.
60 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
2 affected
EngineFuel System
Symptoms
10 common
- •Check engine light illuminated
- •Rough idle or stalling
- •Decreased fuel efficiency
- +7 more
Most Affected Generations
1 generation
XU70
60
Top Affected Components
2 components
Engine
52
Fuel System
8
Severity Levels
2 levels
high
32
medium
28
Quick Facts
107
Total Solutions
2
Affected Components
10
Common Symptoms
1
Generations
All Solutions
Showing 60 of 107 solutions for error code P0171 across all generations.