P0420 — Catalyst System Efficiency Below…

What this code means

Diagnostic trouble code P0420 indicates: Catalyst System Efficiency Below Threshold Bank 1. It was set by your vehicle's onboard diagnostics system and will typically keep the check engine light on until it's addressed.

ECUs que podem desativar P0420

P0420 faz parte do grupo CAT OFF. Estas ECUs suportam CAT OFF, que o desativa:

DODGE / JEEP / CHRYSLER

Continental GPEC2A Continental GPEC3 Continental GPEC2 Continental GPEC5 Continental GPEC4 Continental GPEC4LM

GM GROUP (BUICK CADILLAC CHEVROLET OPEL)

DELCO E38 DELCO E92 DELCO E78 DELCO E88 DELCO E84 DELCO E37 DELCO E90

KIA / HYUNDAI

Kefico CPEGP 3.XX.X Kefico CPEGD 3.XX.X Kefico CPGPSH 3.XX.X Continental SIM2K-250 Continental SIM2K-251 Continental SIM2K-253 Continental SIM2K-258 Continental SIM2K-259 Kefico CPEDG 2.XX.X Kefico CPEGP 2.XX.X Kefico CPGPSH 2.XX.X Continental SIM2K-240 Continental SIM2K-241 Continental SIM2K-242 Continental SIM2K-245 Continental SIM2K-141 Continental SIM2K-143 Continental SIM2K-140

NISSAN / INFINITI

Hitachi SH7055 Hitachi SH7058 Hitachi SH72531 Hitachi SH7059 Hitachi SH72533 Hitachi SH72544 Hitachi RH850

TOYOTA / LEXUS | PETROL

DENSO GEN1 DENSO GEN2 DENSO GEN3 DENSO GEN4 DENSO GEN3 GR86

VAG

Bosch MED9.1

Remove P0420 permanently

Upload your ECU file and DTC Doctor will detect this code (and any others) automatically, then remove it for good — no dealer visit, no guesswork.

Analyze My File Free →