Ecu Scanner help
06-02-2004, 01:41 PM
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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
06-03-2004, 03:01 AM
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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. 
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