So, you think you are in stuck in 4lo...well, I would think it would be noticeable at any given speed...your engine would be spinning like crazy.
A road test of a 2004 Sorento shows a engine speed of 2400RPM at a vehicle speed of 60mph. The 2004 had a 4 speed...I believe your 2005 has a 5 speed tranny, so it should turn less that 2400RPM at 60mph.
My 08 has the same 5 speed as yours, but it has different axle, part time 4x4 and the newer 3.8L engine...but I know for a fact that at an engine speed of 2500RPM...the vehicle is going 78mph on a flat level ground in top gear.
By the way, these 1st (2003-2006) and 1.5 gen (2007-2009) Sorentos weren't know for their great gas mileage. Personally, I only get about 18/19mpg with mix driving...almost about the same as a modern full size truck.
For bad gas mileage, I would check the obvious things...air filter, lazy O2 sensor, MAF, etc. Maybe you have a stuck brake caliper?
Okay, first off thanks guys for replying. Thanks gee6 also. The sorento is a strange duck. Im used to big trucks, with sounds and indications or CELs. This SUV surprises me
its whisper quiet when Im standing right next to the front clip. It has like no vibrations in the cab at all. Its like its just not on. But it has what looks like a beefy frame for its size. And a decent tow package tho im unsure what I would tow with it.
The RPM gauge does not function as intended. If I press the accelerator hard if I am at a stop, the tack will somewhat read what may be the right RPMs. But I am quite hesitant to say that for sure. Driving down the road the needle just blips up every time it changes gears. No idea what RPM its at while driving and the engine noise is hardly noticeable to me unless I am really on it. Im Assuming that its stuck in 4low because 3 reasons. The first being that this car has no engine light on to say something is amiss but the 4low light is on. Its not switching off when I switch to (auto) and the biggest clue is that it feels like im burning through all the gears way faster than I should. Like it will go through the gears just cruising at low speed. That can NOT be the standard shift points for this vehicle.
So not sure exactly how to respond about the RPMs. I can swap out the cluster and probably will next time I go out to the farm and see if this helps. I was going to check Tcase fluid last night but a colony of ants decided they wanted to hang out under the Tcase. I gave them their eviction notice so maybe I can check that today. Beyond this, the car drives normally but feels a bit shaky Not sure if thats the tires having an issue or suspension. Im chalking that up to sitting for as long as it did before being driven.
Lastly as for MPG. I want to run a full tank to be sure. However my initial rough estimate.... Get this. I let it idle for a bit before I drove it. Just to see if it would get to temp without issue. At that time it was close to empty. When I was finished the fuel light came on. Before my test drive I put 2.2 gallons in it. It seemed to give over 1/4 on the gauge. Which was strange. But anyhow I then drove down the road to a lake 5 miles away. And drove back. When I pulled in to my drive I had used a 1/4 tank and after sitting for another 4 minutes the fuel light came on.
So if the fuel light comes on at the same time every time its reasonable to think that I used all 2.2 gallons on that trip. If so then I got 4.5MPG on that drive. Which is one MPG more than my suburban. I was expecting at least 15mpg at the worst. The brakes work fine. The air filter is new. I cleaned the maf with maf spray before I dug in to it. Not sure about the o2 sensor. Normally when these have problems they through codes.