2009 Toyota camry 4 cylinder 2.4 engine non hybrid. My car studders at complete stops/when starting up and driving forward especially up hills had it tested few weeks back P0420 showed up so I had both upstream and downstream O2 sensors changed and the catalac converter changed worked for ah week then problem came back had it tested again P2238 showed up so I had the upstream O2 sensor changed again on the manifold worked for 1 day just had it tested again (yes I go get 3 different tests and opinions at 3 different locations) and P0420 showed up again theirs no way I need a new catalac converter or O2 sensors after ah few weeks PLEASE HELP.
What makes this problem better or worse?
It's worse when going forward and comes to a complete stop
How long has your 2009 Toyota Camry had this problem?
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Testing was incomplete - I suspect the parts were replaced based on *diagnostic* trouble codes alone..
Scan tool DIAGNOSTIC trouble codes are just that - an aid to be used for subsequent *hands-on* diagnostic testing to discover what the actual failures are.
There are many underlying causes that will trigger a particular trouble code that quite often doesn’t even involve a particular sensor or component..
In addition - some aftermarket parts are, well - junk right out of the box..
It is highly recommended to have a full and complete professional SCAN TEST of all operating systems so the related data parameters can be observed - this testing will be looking for a reason the trouble codes exist - not to find the codes themselves.
Good luck!
