Minor loss of power on small hills.

Howdy y'all, I've recently noticed a small power loss in my 2010 Prius. It's not noticable if you're not familiar with the vehicle, I can still get to highway speeds as fast as you would expect. But here's my problem: when going up slight hills, the vehicle seems to take more effort than necessary. For example, the display will show the energy all the way in the PWR range when it would normally be in the regular zone. Cruise control on a flat surface acts normal, but up a slight gradient, the engine must work significantly harder than it use to. You can also hear the engine working harder than it use to.

128,000 miles
Brand new 12V
EGR system replaced last year
Coolant level steady
Minor oil consumption, but I keep on top of that.
Battery charges and discharges normally.
No check engine light.
No warnings.

My driving habits are averaging at 5mph above the speed limit. Here in Texas, we have 60 to 75 speed limits around my area. It's much more noticeable at high speeds. At 70 MPH, the gas must floor it to keep speed up a slight hill that would normally have a minor impact on gas consumption. MPG stays at 40-50 on a flat surface.

Anyone have any idea?

 

Correct. I've owned the vehicle for almost 3 years, it now takes noticeably more effort to travel the same hills than it use to. This began on a short road trip last week.

 

Nope. I've checked that.

 

Honestly at this point, I have no idea. They told me they did the whole circuit, but those guys did so much damage to the EGR I had to have it replaced AGAIN under warranty at a different location. Tire pressures are normal. I have not done the 120K yet, but plan to once my local shop reopens to full service, which should be very soon.

 

Unfortunately I learned that the hard way.if only I had the tools and resources to DIY. As a college student I don't have my own place to store equipment or work on my vehicle.

 

I don't own one but have access to a cheap scan tool. I am unsure whether or not it is compatible with Dr. Prius.

 

I appreciate the offer. I'm going to take my car in for the state inspection plus some regular maintenance and see of they can determine anything while they're at it.