My 2002 pt cruiser won't shift out of low.

Have you checked you transmission fluid level?

This is going to be a transmission problem.

Question is contradictory. First you say won't shift out of first gear, then you say won't shift pst second. If the latter is correct, yes could be the 3-4 shift solenoid has failed.

You could try the linkage cable from the shifter(under the hood). It could be alot of things. Is it auto or manual trans? And what do you mean by wont shift? Is the the shifter moving from P,R,N,D, ect... or the transmission is not shifting into a higher gear?

I had almost the same problem, I checked to the bushing on the shift cables and they were gone. I found the kit at orielly's auto for $8. its a manual cable bushing kit

Also could be valve solenoids, internal itranssmision!

OK... brains are expensive. It sounds like your PT STARTS OK, but keeps your TRANSMISSION locked.

Many transmissions have a 'lock' that is coupled to the car BRAKES. So the transmission may not allow SHIFTING if the BRAKE SWITCH is not sensed as 'brakes applied'.

APPLIED BRAKES = OK TO START/SHIFT. So it's possible a defective switch is your problem?

Find really GREAT information here:

How To Solve The PT Cruiser Transmission Problems

And there is this: "You Probably have a 604 41 TE auto trans (this is a four speed automatic trans)and if this is the case. Then you need to have the input and the output turbine sensor's replaced,(aka speed sensor) same thing different name. These sensors are cheap and have a high failure rate due to high temps the trans produces."

Now see this:
Transmission not shifting 2001 Chrysler PT Cruiser

and more here:

How to replace 41 TE auto transmission in an 01 pt cruiser neon pt 1

While you are at YOUTUBE search for:
"PT Cruiser Automatic transmission" won't shift

Anthony

http://freeautomechanic.blogspot.com/2008/01/code-p0700.html

you will need to replace your transmission, this is a very common problem with the ultradrive transmissions.

if you have added any fluid to the transmission chances are it was the wrong type.

Check light on , have codes checked . Transmission not shifting into a gear , could be a shift solenoid . Take your vehicle to a qualified repair shop , before it get's ruined .