A constant drain on a battery will shorten it's life. If you have a wire shorted out somewhere on your vehicle, it could be draining the battery ever so slightly, start by looking for a dead short in the system.
Having same issue I replaced it but not back to 02 sensor low voltage.I'll bet anything I'm still researching but all of us replacing parts and it doesn't help. I hear there is a Body Control Module somehow integrated in the cluster that controls power to relays and other modules if there is a short or ground issue the whole car has issues also the vehicle security control module if it has a short or ground issues kills the OBD 2 port as well somehow it in the ignition system short or ground issues similar issues. Hope this helps all of us!
When you turn the key on the ASD relay should turn on the fuel pump and power the injector, Do this lets cheat the system go to the ASD rely open the cover expose the inside have some one turn the key on does the ASD make contact? If not turn the key on collpase the ASD so it make contact do you hear the fuel pump come on? Now try this just as how you iopen the ASD do the same to the starter relay. Put the car in gear e brake on someone in the vehicle in case the car start and you are in front of it and it runs you over so at least they step on the brakes. Key on ASD exposed as your collapse the starter relay does the ASD relay turn on? Here why if you can control all the relay from under the hood you will need a ignition switch (the eletrical part)
Get the service and repair manual from the given this manual with pictures and diagram so that you fix the problem on your own easily http://toolsnyou.com/
Check for 5 volt reference signal at the TPS - throttle position sensor , could have shorted sensor causing the problem . Do you know what a computer 5 volt ref. signal is ? Video's on youtube . Your engine computer controls the starter motor relay which turns on the starter . Free wiring diagram's here
http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine ,then under subsystem click on starting . Click the search button then the blue link. Find the starter motor relay in the under hood fuse / relay box , pull it out an look at the bottom , where the pins are . You should see four set's of numbers , 30 , 87 & 85 , 86 . PIn's 30 & 87 are for the power feed to starter , pin 30 should have battery volt if tested with a voltmeter . If you jumped pins 30 & 87 with a piece of wire if the starter is good an battery cable an connections are good the starter would spin the engine over . Just so your not confused , jump where the relay plugs into the fuse box , not the pins of the relay .
5 volt reference
If the 5 volt reference is good , check power an ground circuits to the PCM - engine computer .
If that is good , suggest you take your vehicle to a qualified repair shop for more indepth testing .
To many things that can cause the issue your having. Drive to Auto Zone and they can scan your PT Cruiser free of charge and can give you the recommended solution to address any DTC codes that is retrieved.
Thank you for using fixya and post abck with your DTC codes.
like you said something broke. that is a great guess. open the hood and jack up the car. you may need to remove the center console to get at the shifter. you want to get under the car and check the shifter cable to the transmission and see if its broke there or disconnected from the linkage. if its not then follow it into the cab through the floor and follow to the shifter. the cable amy be about 6 feet long maybe shorter or longer depending how it i run around. if its not broke under neath its inside. should be a matter of inspecting and removing panels to get at it. check youtube for any videos on disassembly for panels. sometimes it can help. either that or pry and pull till you get it off. if you don't have rear wheel drive then just open the hood and look at the top of the trany and you should see the shifter there and might have to remove some stuff to get at it. they pack stuff in there tight
run fault codes
indicates a torque converter clutch servo/ solenoid or TCM provlem
It will be electronic / solenoid problems and not a transmission replacement requirement
Blasts Freon out of the compressor? Have you witnessed refrigerant gas being expelled, and if so, from where? Be precise with your description.
Does the AC get cold?
If you're experiencing rough idle when the AC is on, then check the IAC (Idle Air Control) valve and circuit, including looking for any blocked ports under the valve (you'll have to remove the IAC valve).
Also - observe the compressor with AC on to see if the compressor is cycling on/off every few seconds. If yes, then you'll need to have the system checked for proper pressures.
Run it for a minute, then shut it down and pull the dipstick for the oil, see if there's water on it, that would tell you if the head gasket is bad. If you're still unsure, drain the oil into a pan and look for coolant in there
