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P0420 Diagnostic Trouble Code Discussion for January 2005

Catalyst Efficiency Below Normal (Bank 1)


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Trouble Ticket Help Requests for DTC P0420
Help Request Posted
2000 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K3Y
P0420: Catalyst Efficiency Below Normal (Bank 1). hello fellow techs, Have a 2000 camry with P420 code, car has calif. emession & federal, Have replaced front air fuel sensor, light came back on , having trouble determining which cat is bad, front one at manifold or rear cat under car. any help would help...
January 06, 2005
1999 Ford F-150 4.2L MIL Lamp on VIN: 126K468402
hi fello tech : i am trying to find out a bit more of these two codes .i know what the codes are but just need to know the source of the prob could it be the sensor or the catalyst block .any info on this would be appreciated .Thanks in advance . phil
January 18, 2005
1999 Ford F-150 4.2L MIL Lamp on VIN: 126K468402
hi fello tech : i am trying to find out a bit more of these two codes .i know what the codes are but just need to know the source of the prob could it be the sensor or the catalyst block .any info on this would be appreciated .Thanks in advance . phil
January 24, 2005
2000 Ford F-450 Super Duty Lariat 7.3L No Start, Poor Idle Quality, No power VIN: 3FDXF46F2Y
P0420: Exhaust Back Pressure Control Problem. ... out of ideas. This F450 cranks Ok but starts hard or fails to start when cold. If key is left on for another 20 seconds after wait to start light goes out it runs a little better, but still not good. After it does finally start, it has no power and idles r...
January 27, 2005
2000 Toyota Camry CE 2.2L MIL Lamp on VIN: 4T1BG22K3Y
P0420: Catalyst Efficiency Below Normal (Bank 1). hello fellow techs, Have a 2000 camry with P420 code, car has calif. emession & federal, Have replaced front air fuel sensor, light came back on , having trouble determining which cat is bad, front one at manifold or rear cat under car. any help would help...
January 06, 2005
1999 Ford F-150 4.2L MIL Lamp on VIN: 126K468402
hi fello tech : i am trying to find out a bit more of these two codes .i know what the codes are but just need to know the source of the prob could it be the sensor or the catalyst block .any info on this would be appreciated .Thanks in advance . phil
January 18, 2005
1999 Ford F-150 4.2L MIL Lamp on VIN: 126K468402
hi fello tech : i am trying to find out a bit more of these two codes .i know what the codes are but just need to know the source of the prob could it be the sensor or the catalyst block .any info on this would be appreciated .Thanks in advance . phil
January 24, 2005
2000 Ford F-450 Super Duty Lariat 7.3L No Start, Poor Idle Quality, No power VIN: 3FDXF46F2Y
P0420: Exhaust Back Pressure Control Problem. ... out of ideas. This F450 cranks Ok but starts hard or fails to start when cold. If key is left on for another 20 seconds after wait to start light goes out it runs a little better, but still not good. After it does finally start, it has no power and idles r...
January 27, 2005