LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Acura
>>
2004
>>
TSX Standard
>>
Repair and Diagnosis
>>
Quick Lookups
>>
DTC Index
>>
Catalytic Converter System
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Catalytic Converter System
CATALYTIC CONVERTER SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
DTC (MIL indication )
Description
P0420
(67)
Catalyst System Efficiency Below Threshold
P0420
(67)
Catalyst System Efficiency Below Threshold