HomeP0420 · Manufacturer wording

P0420 · Manufacturer wording

The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.

P0420 →

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

LexusP042000
Catalyst System Efficiency Below Threshold Bank 1

NHTSA 11021725

LincolnP0420
CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD - BANK 1

NHTSA 10004951

MercuryP0420
CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD - BANK 1

NHTSA 10004951

MitsubishiP0420
Warm Up Catalyst Efficiency Below Threshold, recorded in the ECM

NHTSA 10170690

NissanP0420
Catalyst System Efficiency Below Threshhold Bank 1

NHTSA 10141431