honda accord p0420 ??????

[mike]

hi guys quick question i got the code p0420

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[Trcustoms719]

Aftermarket converters don’t make the cut most of the time for Hondas.
Do you have a scanner or code reader that can view live data and graph? You need to see what the down stream o2 signal looks like.

[dreamer2355]

Quoted From Trcustoms719:

Aftermarket converters don’t make the cut most of the time for Hondas.
Do you have a scanner or code reader that can view live data and graph? You need to see what the down stream o2 signal looks like.

+1

OEM cats. are the way to go. That’s why there so expensive.

I would also do a visual inspection too.

[EricTheCarGuy]

+2 on aftermarket cats not working on Hondas. The way you check the O2 sensors is to observe their readings on a scan tool with live data as the engine runs after it’s warmed up. The primary O2 should switch back and forth fairly rapidly betwe

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