Toyota Highlander
P0300-P0306
The check engine light on your 2020-present Toyota Highlander (Fourth Generation) is flashing, indicating a potential serious issue with the engine or emissions system.
37 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
5 affected
Engineignition coilspark plugs+2
Symptoms
10 common
- •Check engine light flashing
- •Engine misfire or rough idle
- •Decreased power or acceleration
- +7 more
Most Affected Generations
2 generations
XU70
31
XU50
6
Top Affected Components
5 components
Engine
30
ignition coil
4
spark plugs
1
Fuel Injectors
1
Ignition System, Fuel System, Air Intake, Engine Mechanical, Sensors
1
Severity Levels
2 levels
high
30
medium
7
Quick Facts
37
Total Solutions
5
Affected Components
10
Common Symptoms
2
Generations
All Solutions
Showing 37 of 37 solutions for error code P0300-P0306 across all generations.