Shortly after replacing the serpentine belt in my lancer, the same thing happened. It is NOT the timing belt. Belts squeal when they slip. If your timing belt slipped it would cause your car to run funny.
have somebody check the belt for wear (or do it yourself), replace if necessary. If it doesn't need replacement, just tighten it.
If you have the 4cyl engine that I have, the tightening is kind of a pain in the ****. Not a great design by mitsubishi. There's a pulley near the front right corner of the engine in front of the alternator. the belt should be running around this pulley GROOVE SIDE OUT. This is the tension pulley.
1) Lightly loosen the bolt in the center of the pulley (slightly loosen, DO NOT REMOVE).
2) Under that pulley there's another bolt. You can see that the bolt goes through a piece of metal
attached to the back of the pulley. Figure out which way you need to turn the bolt to move the
pulley toward the front of the car. (i don't remember if it's right hand thread, or left hand) This
puts extra tension on the belt. You probably don't need much. Over tensioning the belt can
cause pulley bearing failure. If you haven't done this work before, ask someone for
help. It's better to tighten a little bit, a few times rather than overtighten once.
3) Don't forget to ReTighten the bolt in the center of the pulley.
If there's lots of cracks and pieces missing on the ribs or grooves of the belt you should replace it first.
take it to a garage and put it on the obdII reader.Save the guesswork.Had 1 just like that and the the code reader diagnosed 7 different things.But car should be running.I fixed mine by replacing almost all the sensors and the computer
I also have an 04 Sorento and LOVE it. I live in northern indiana where it is super cold in the winters and just this year my truck started squealing when temps got low and when the heat is on. My dad has also changed the belts, even though they looked fine. that didn't fix the problem. I was searchng for some answers and it seems that many people are having this same issue with sorentos. Its super annoying and like you sid embarassing! I love my truck, but HATE this sound! if you find anything else out, please post! Thanks!
I had the same thing this morning does anyone know is it bad starter ?
Oil dipstick has nothing to do with whining noise