Ecu Scanner help
 

My nephews scanner was reading: P0420 Catalyst System Efficiency Below Threshold. Is that regarding the cat ? the ecu was also throwing a code 67. Thanks in advance

Re: Ecu Scanner help (BeesDA6)
 

do you have any other codes for the powertrain? I looked it up and if there is other PO codes (DTC) with a PO137, PO138 or PO141 then you have a related short to the HO2S might want to check and see if you have a short from the lines to the HO2S and also check the HO2S. https://honda-tech.com/forums/images/smilies/emthup.gif

Re: Ecu Scanner help (Quitripin)
 

Nope just that one