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P0420 and p2238 test results
2009 Toyota Camry

P0420 AND P2238 TEST RESULTS

(2009 Toyota Camry)
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 seems to make the problem better or worse? It's worse when going forward and comes to a complete stop
How long have you had this problem? About ah month now
Tags: studdering problem, toyota, camry
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Popular Answer
on May 18, 2019

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!
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General Diagnosis
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on May 18, 2019

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!
Sign in to reply

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