I just bought a pilot 03 and i see the famous P0420 error code - Catalyst system Efficiency below threshold. The only thing I noticed was that the engine oil was getting low so I changed the engine oil and wiped the check engine sign. I do not know if I solved the problem. Any ide...
Re: ECU report P0420 - 007 Catalyst efficiency below thresho PostbyCarl Grotti»Fri Oct 01, 2010 4:56 pm Mirda, First of all, it seems this is automotive specific, so this particular forum is probably incorrectly placed. Secondly, it would be helpful if you would put the year, make,...
1. If any other fault codes are present besides catalyst (CAT) faults, the other codes must be addressed and corrected before proper/complete CAT testing can be performed. 2. VW/Audi standards on CAT fault codes is: a. Clear the fault code and use a factory-compatible scan tool to force...