Car Troubles

Asked by Tom An Tamara May 18, 2019 at 04:25 PM about the 2009 Toyota Camry SE

Question type: Maintenance & Repair

My 2009 toyota camry 4 cylinder has been sputtering when
started at first idle then when going forward especially up
hills and when coming to a complete stop took it to get
tested P0420 showed up had the catalac converter and
both the upstream O2 sensor and downstream O2 sensor
replaced a week later did it again had it tested again P2238
showed up so I had the upstream O2 sensor replaced again
for the 2nd time then yesterday it started sputtering again
and took it to get the test from 3 different shops all said
P0420 which their is no way I have a faulty converter and
O2 sensors the quick but what's causing it is my concern
I've also replaced all spark plugs all cylinders (2 of them
twice) the air filter and the upper motor mount which I've
learned I need to replace the other motor mounts so can
any please Help Me...

1 Answer
65,510

firebird338 answered 5 years ago

If you use the low grade octane gas ( 87 ) try using the middle grade gas ( 89 ) or better yet the high octane gas ( 93 or 94 ) hade same problem not the cutting off but check engine light coming on saying saying oxygen sensors replaced them with in 2 days light comes back on saying oxygen sensors took vehicle to AAA and they said catalytic converter needs to be replaced so instead of replacing converter started using the high octane gas to make along story short it took 10 tank fills and light coming on and going off 4 times but light is out and stays out now since light is out still use the low octane sometimes but mostly use the middle grade gas.

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