Toyota Corolla
P0420
The P0420 code indicates that there is a problem with the catalytic converter efficiency in a 2019-2024 Toyota Corolla E210. This code is triggered when the engine control module (ECM) detects that the catalytic converter is not functioning as intended.
60 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
3 affected
Exhaust SystemEngineElectrical
Symptoms
10 common
- •Check engine light illuminated
- •Decreased fuel efficiency
- •Poor engine performance
- +7 more
Most Affected Generations
1 generation
E210
60
Top Affected Components
3 components
Exhaust System
56
Engine
3
Electrical
1
Severity Levels
2 levels
high
37
medium
23
Quick Facts
340
Total Solutions
3
Affected Components
10
Common Symptoms
1
Generations
All Solutions
Showing 60 of 340 solutions for error code P0420 across all generations.