Hesitation and Occasional CEL when in Reverse

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Salanizi

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Hello

My 2015 3.0 SCV6 (70k miles) has developed a weird conditon that only comes when after a long drive.

After a long drive when i put it in reverse to park, it drives rough and develops a hesitation and occasionally throws a CEL.

I took it to a local indy and when he plugged the Autel device he has, it showed O2 sensor bank2 sensor2 something wrong with the voltage, as well as the fuel pressure regulator (near the tank low pressure)

I changed both those and still the problem is there.

I noticed that when starting from cold or even if it sat for a while, it would not act up like that, only after a long drive.

Any ideas? I really need any help

Ps. Already changed sparks/plugs/air filters and a couple more 02 sensors and ran 4 injector cleaner bottles through it.

Mechanic says could be a vacuum leak or dirty throttle body ..
 
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