LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2019 >> Corolla SE, 4D Hatchback, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Engine Control System (2ZR-FE) - Diagnostic Codes (2 Of 7) (Model Code: ZRE172)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) [08/2016 - ] >> Monitor Result
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Monitor Result

WARNING: This page is about a different variant/trim than selected.

Refer to detailed information in Checking Monitor Status.

Refer to CHECKING MONITOR STATUS [08/2013 - ]

P0420: CATALYST EFFICIENCY / O2 STORAGE B1

Monitor ID Test ID Scaling Unit Description
$21 $AF Multiply by 0.001 No dimension Oxygen storage capacity of catalyst bank 1 (Normalized)