WebDec 10, 2024 · The real cause of P0420/P0430 DTCs. Dec. 10, 2024. The 'Catalytic Converter Efficiency' codes might imply a failed converter, but odds are the ultimate fault … WebContents [ hide] Yes. Bad spark plugs can cause a P0420 code because when one or more spark plugs are faulty, they are not able to ignite the air and fuel mixture in the combustion chamber so the unburnt mixture, along with the Nitrogen Oxide and Carbon Monoxide from the combustion chamber will go into the catalytic converter. The most …
P0420 Code (Catalytic Converter) Toyota Nation Forum
WebDec 28, 2016 · Hi there, About a month ago, I had the PO420 code and put in a new ignition coil, the code went away for like three weeks, I was so happy I thought it was fixed. Then yesterday, after a long drive, it mysteriously reappeared. My mechanic said the plugs are ok, I have new coil in there, and the EGR valve was cleaned out. Prior to cleaning the … WebFeb 14, 2024 · It's got a nagging, intermittent p0420 code. And possibly related, the gas mileage is about %20 below where it should be, getting appx 22 mpg out of expected 28 … china population and development studies 影响因子
PO420/PO430 codes after replacing ignition coil?
WebDec 2, 2024 · checked spark plug on cylinder 1 didn't look wet but had some sort of small amount of grease looking thing on it. it didn't look like it was wet though. it did look like it wasn't firing properly seen some burnt part under the tip on the white part. wasn't cracked. ended up getting 6 new spark plugs. replaced them all. all other 5 spark plugs ... WebApr 12, 2024 · Will bad spark plugs cause a check engine light to flash and generate DTC codes? It depends. A bad spark plug (or spark plug wire) may cause a P0300, P0301, P0302, P0303, or P0304 code, but don’t assume the problem is just a faulty spark plug. These codes are indicators of severe potential engine trouble and should be looked at … WebApr 26, 2024 · What are the Possible Causes of the P0300 Code? There are many possible causes of a P0300 trouble code: Ignition system problems (e.g. a bad distributor or worn spark plugs) Fuel delivery … china population 2011