Toyota Corolla
B1421
The diagnostic trouble code (DTC) B1421 in a 2013-2019 Toyota Corolla E170 indicates a malfunction related to the air conditioning (A/C) system, specifically concerning the A/C refrigerant temperature sensor.
2 SolutionsB-CodeBody
B
Error Code Type
Body
Components
1 affected
HVAC
Symptoms
10 common
- •Air conditioning not cooling properly
- •A/C compressor not engaging
- •Erratic A/C performance
- +7 more
Most Affected Generations
2 generations
E170
1
E140
1
Top Affected Components
1 component
HVAC
2
Severity Levels
1 level
medium
2
Quick Facts
2
Total Solutions
1
Affected Components
10
Common Symptoms
2
Generations
All Solutions
Showing 2 of 2 solutions for error code B1421 across all generations.