P0420 · Manufacturer wording

CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD

NHTSA 10004802 ↗

rear bank catalyst system efficiency below threshold [bank 1]

NHTSA 10164056 ↗

Rear Bank Catalyst System Efficiency Below Threshold [Bank 2]

NHTSA 10146080 ↗ NHTSA 10149656 ↗ NHTSA 10150284 ↗ NHTSA 10150286 ↗ NHTSA 10152738 ↗

Catalyst System, Bank1 Efficiency Below

NHTSA 10251506 ↗

Catalyst System, Bank1 Efficiency Below" Coolant leak from expansion tank Corrosion inside door module Fuel pressure low

NHTSA 10243976 ↗

Catalyst System,Bank1 Efficiency Below

NHTSA 10253336 ↗ NHTSA 10253337 ↗

Catalyst System,Bank1 Efficiency Below Front window inoperative Air suspension warning - DTC

NHTSA 10245646 ↗ NHTSA 10245649 ↗

Catalyst System,Bank1 Efficiency Below"

NHTSA 10242978 ↗

Catalyst System,Bank1 Efficiency Below" Check engine lamp, Belt Starter Generator DTC

NHTSA 10241486 ↗

Catalyst System, Bank 1 Efficiency Below Threshold

NHTSA 10230837 ↗

Catalyst System, Bank 2 Efficiency Below Threshold

NHTSA 10230837 ↗

Catalyst System, Bank1 Efficiency Below Threshold

NHTSA 10230840 ↗

Catalyst System Low Efficiency

NHTSA 10138111 ↗

Catalyst Efficiency (Bank 1)

NHTSA 10223817 ↗

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10187698 ↗ NHTSA 11012184 ↗ NHTSA 11034362 ↗

CATALYST EFFICIENCY

NHTSA 10015801 ↗

Catalyst Efficiency (Bank 1)

NHTSA 10223817 ↗

CATALYST EFFICIENCY, OR MAY HAVE FAILED A CALIFORNIA SMOG OR STATE I/M TEST BUT WITHOUT AN ILLUMINATED MIL, OR A RATTLING SOUND FROM THE UNDERSIDE OF THE VEHICLE

NHTSA 10018993 ↗

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10187697 ↗ NHTSA 10187699 ↗ NHTSA 10243229 ↗ NHTSA 11005019 ↗ NHTSA 11012186 ↗ NHTSA 11020115 ↗ NHTSA 11020116 ↗ NHTSA 11029760 ↗ NHTSA 11033947 ↗ NHTSA 11034359 ↗ NHTSA 11034362 ↗

CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD - BANK 1

NHTSA 10004951 ↗

Catalyst System Efficiency Below Threshold (Bank 1)

NHTSA 11009829 ↗

catalyst system efficiency below threshold

NHTSA 10133022 ↗

Catalyst System Efficiency Below Threshold

NHTSA 10128539 ↗ NHTSA 10128556 ↗ NHTSA 10128868 ↗ NHTSA 10129274 ↗ NHTSA 10129303 ↗ NHTSA 10129322 ↗ NHTSA 10129439 ↗ NHTSA 10129441 ↗ NHTSA 10129479 ↗ NHTSA 10129501 ↗ NHTSA 10129520 ↗ NHTSA 10129815 ↗ NHTSA 10141151 ↗ NHTSA 10222076 ↗ NHTSA 10246405 ↗ NHTSA 10248678 ↗ NHTSA 10249201 ↗ NHTSA 10250329 ↗ NHTSA 10250729 ↗

CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD

NHTSA 10002097 ↗ NHTSA 10003479 ↗ NHTSA 10004795 ↗ NHTSA 10036966 ↗

rear bank catalyst system efficiency below threshold [bank 1]

NHTSA 10142636 ↗ NHTSA 10183520 ↗ NHTSA 10187006 ↗ NHTSA 10187008 ↗ NHTSA 10189942 ↗ NHTSA 10189943 ↗

CATALYTIC CONVERTER SYSTEM, BANK 1 - EFFICIENCY BELOW THRESHOLD

NHTSA 10082702 ↗ NHTSA 10082722 ↗ NHTSA 10082724 ↗

THREE WAY CATALYST FUNCTION

NHTSA 619822 ↗

Mileage up to 80,000 miles (130,000 km) - No previous incidence of misfire DTC's P03xx

NHTSA 10110946 ↗

CATALYST EFFICIENCY, OR MAY HAVE FAILED A CALIFORNIA SMOG OR STATE I/M TEST BUT WITHOUT AN ILLUMINATED MIL, OR A RATTLING SOUND FROM THE UNDERSIDE OF THE VEHICLE

NHTSA 10018993 ↗

Catalyst System Efficiency Below Threshold Bank 1

NHTSA 10243231 ↗ NHTSA 11015523 ↗ NHTSA 11020109 ↗ NHTSA 11020110 ↗ NHTSA 11021030 ↗ NHTSA 11021563 ↗ NHTSA 11025711 ↗ NHTSA 11025720 ↗ NHTSA 11027729 ↗ NHTSA 11034358 ↗