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P0420 Diagnostic Trouble Code Discussion for July 2011

Catalyst Efficiency Below Normal (Bank 1)


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Trouble Ticket Help Requests for DTC P0420
Help Request Posted
1997 Nissan Pickup XE 2.4L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1N6SD11Y7V
P0420: Catalyst Efficiency Below Normal (Bank 1). a little over a year ago i replaced head gasket on this truck after it han been sitting for 3 years when we started it was knocking so we installed a used engine that acording to the salvage yard had a little over a hundred thousand miles it ran ok but it had ...
July 03, 2011
1997 Nissan Pickup XE 2.4L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1N6SD11Y7V
P0420: Catalyst Efficiency Below Normal (Bank 1). a little over a year ago i replaced head gasket on this truck after it han been sitting for 3 years when we started it was knocking so we installed a used engine that acording to the salvage yard had a little over a hundred thousand miles it ran ok but it had ...
July 05, 2011
2007 Dodge Caliber R/T 2.4L MIL Lamp on VIN: 1B3HE78KX7
P0420: Catalyst Efficiency (Bank 1). Hi techs I have a p0420 should I replace both converters [Ithink there is one in the exhaust manifold] or can I get away with just one?If so which one thanks
July 08, 2011
2003 Honda CR-V LX 2.4L MIL Lamp on VIN: SHSRD77833
P0420: Catalyst Efficiency Below Threshold (Bank 1). finally replaced, and after approximately 250 miles, MIL lamp came back on , but O2 sensors are both working fine. I cleared the code, and will monitor it this week. What is the norm for this vehicle considering mileage etc.Will I need to plan to get a cat con...
July 25, 2011
1997 Nissan Pickup XE 2.4L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1N6SD11Y7V
P0420: Catalyst Efficiency Below Normal (Bank 1). a little over a year ago i replaced head gasket on this truck after it han been sitting for 3 years when we started it was knocking so we installed a used engine that acording to the salvage yard had a little over a hundred thousand miles it ran ok but it had ...
July 03, 2011
1997 Nissan Pickup XE 2.4L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1N6SD11Y7V
P0420: Catalyst Efficiency Below Normal (Bank 1). a little over a year ago i replaced head gasket on this truck after it han been sitting for 3 years when we started it was knocking so we installed a used engine that acording to the salvage yard had a little over a hundred thousand miles it ran ok but it had ...
July 05, 2011
2007 Dodge Caliber R/T 2.4L MIL Lamp on VIN: 1B3HE78KX7
P0420: Catalyst Efficiency (Bank 1). Hi techs I have a p0420 should I replace both converters [Ithink there is one in the exhaust manifold] or can I get away with just one?If so which one thanks
July 08, 2011
2003 Honda CR-V LX 2.4L MIL Lamp on VIN: SHSRD77833
P0420: Catalyst Efficiency Below Threshold (Bank 1). finally replaced, and after approximately 250 miles, MIL lamp came back on , but O2 sensors are both working fine. I cleared the code, and will monitor it this week. What is the norm for this vehicle considering mileage etc.Will I need to plan to get a cat con...
July 25, 2011