PO420 CODE

50

Asked by campos100 Aug 08, 2017 at 08:53 PM about the 2001 Honda Accord EX

Question type: Maintenance & Repair

i am getting a code called P0420 : Catalyst System Efficiency Below Threshold
(Bank 1) can it be the sensor or something else? help please tags are due in 3
days. Thank you everyone.

1 Answer
3,290

Guru94C5K answered 7 years ago

usually its a slow response from the back o2 sensor if you are turning the car in just reset the code before you do

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