HELP!!Losing power when going uphill but get it back when on flat ground....

[lynne2007]

3 days ago I got my oil changed and 150 miles later that day my car started losing power on the interstate going ever so slightly uphill. I took my car to autozone and got error codes P0740...P0732...P0422 What can I do someone PLEASE HELP

[MeettheCreeper]

Originally Posted by lynne2007

3 days ago I got my oil changed and 150 miles later that day my car started losing power on the interstate going ever so slightly uphill. I took my car to autozone and got error codes P0740...P0732...P0422 What can I do someone PLEASE HELP

More than likely you have a failing transmission.

[swiftknight23]

or you may have worn rings and or valves.

it's reasonable to assume that the rings and
valves (inside the engine) have become worn. Worn rings
and valves will cause the engine to have low compression
and low compression = weak power.
You may be curious as to why the engine's lack of power is
most evident when driving up a hill. Well, when a vehicle is
going up a hill, the engine is under more stress than when
driving on a flat road. Therefore, any wear in the rings/valves
will tend to be revealed - in the form low compression - when
the engine is under stress.

you will need to have a mechanic verify that the rings and/or
valves are indeed worn. Incidentally, this generally involves
what's known as a "wet compression test".
If the mechanic tells you he positively confirmed a worn ring
and/or worn valve condition, don't immediately authorize him
to do the work. Why? Because, this type of work is very
expensive and therefore you'll want to get several opinions
before jumping into anything. By the way, even though this
vehicle's high mileage strongly points to the above diagnosis,
it's possible the cause of this problem is something else.
For example, one of the electronic sensors that controls the
engine may have gone bad.

[barkjar]

P0442 is usually a bad gas cap. Or a gas cap that is not tightened. We have had to change ours about 3 times now and it is a 2001.
P0732 is incorrect gear ratio. Try having your speed sensor changed before you jump to a new transmission. This sensor tells the car when to shift if it is malfunctioning it will not run well. This sensor is only about 48.00 but you have to buy it from a dealer and if you don't know how to fix it yourself a mechanic is a good idea.
The other code I don't recognize yet it might be a different gear ratio that is out.