voltage drop

Heat can effect when codes set if components have to reach a certain temperature before they fail when they go bad then yes. I just looked up that code it asks if there are any TIPM codes?That is the computer fuse box under hood. That would take a professional scan tool that can read all the computers in your car not just the engine and transmission like the diy'er scan tool code readers.That is the first step on the trouble tree.Those TIPM have a high failure rate.

On this one it is best to know what codes all the computers in the car have. Also it might take a professional scan tool to help diagnose the problem.The way it is going a lot of the time a professional scan tool is need to see what codes all the computers have.Plus it is needed to help diagnose the problem. Which it was not so would have saved a lot of money when I had to buy my professional scan tool.

I took my car to a mechanic the beginning of this year. he said the car needs a computer. i did not have money at that time. so last month i bought a manufactured computer from autozone and installed it. it was running fine no code until few days ago the weather was hot 95 degrees and up the check engine light came back. last year before i replaced the pcm the car goes on limp on mode when only the weather is hot.now the codes stored in pcm are p0700, p0882, p0633, p0513.

Hey ZEMORZEMOR,

It sounds like the TCM is bad, I have read on other forums that this is a common problem with the make and model of your car.

Let me know what you find so you can help others

Best, Ken

in 06 pt cruiser ecm and tcm are one unit called pcm. and i replaced the pcm 2 months ago.

It sounds like it is bad again, sorry. Check all system grounds by performing a pin to pin check on all computer wiring systems, check for high ohms or open circuits.

ok i will check the wirings. but can you tell me why the code p0882 comes only in summer time. in winter time its fine

Could be the ambient air temperature sensor give you problems

i forgot to tell you. there are codes stored in the computer po882 po700 p0633 p0513. however the check engine light is off . why there are codes but the check engine light is off?

Try to clear the codes and see if they come back

I cleared the codes last night . i drove the car today all the monitors passed . no codes so far . hopefully it stays like that

Today my girlfriend was driving when the car jerked ( i guess it shifted down) because the rpm went up to 3500. so she pulled over and left the car at gas station. when i came back from work i hooked up the scanner actron plus. the codes are p0882 tcm power input low, p0562 system low voltage, p0633 key not programmed ( i replaced the pcm ).p0700. when i started the car and did a drive test i was shifting right

this issue come only when the ambient temperature is hot 95 today and when i drive the car for long period

I see system voltage low code was the charging voltage checked the the car was acting up?

sorry i could not understand your question?

Was the charging voltage checked when the car was acting up?

no my girlfriend was driving it. she told me she pulled over and turned off the car. after she started the car again and the car was idling almost 2000 rpm

I checked freeze frame data for code p0562 it says ecu voltage was 13.7v

That makes no sense it should be bellow 12 volts I would imagine to set that code

this is all freeze frame data

Fuel system CL
Calc load 20%
Ect 214
Stft 12.5
Ltft 4.7
Map 6.8
Rpm2460
Vehic Speed 29
Spark Adv 44.5
iat 160
Tps 16.1
Run time 268
Command evap 0
Fuel level 22.7
Baro 12.5
ECU voltage 13.712
Ambient 97
Load value 14.1
Eq ratio 0.999
Rel tps 0

today i drove the car without ac on . the weather was hot.the check engine went off however those codes are still stored. so if the check engine light went off is that means that there is no low system voltage anymore?

You could have a intrrmittently
Failing alternator or a bad junction box under the hood feeding low voltage intermittently.so does the car ever die when it acts up?

no the car never dies.before to start the car i had to push slightly on the ignition switch while turning the key to the run position i do not know if it related to the problem.

Sounds like the ignition switch is failing that could cause voltage loss .

i replaced the ignition switch

Just now?or before that?

before

Before. yesterday i performed a alternator voltage drop . the hot side was 0.2v at idle and accessories on( headlight, ac, warning lights, back defroster).the negative side was 0.05 at idle

Iam more worried about what it is across the battery terminals when it's running.

i think it was 14.2 v

ok i checked voltage again when car is at operating temperature and at idle voltage was between 14.1 to 14.4. and i measured the ac voltage too it was at idle 0.05 V

That's the tipim fuse box under the hood I have seen them go bad and cause all kinds of problems.it's a fuse box with a computer.They can be intermittent and hard to diagnose.Try clearing the codes then while it's running push on the relays and different parts of the tipim fuse box and see if the codes come back.

i will do that.
i have a question what is the minimum acceptible voltage an alternator produce when the car is running at idle with all accessories off

today i took off the tipm from his mounting bracket and wiggled the connectors, a p0882 code shows up . the problem was the yellow with brown strip wire coming from the pcm had bad connection at the tipm connector. i think p0882 code is fixed i cleared the codes and i did not see code p0562 yet.

Thank you so much for your help

What happens is the large wires run a lot of current thru them wwith a lot of heat.So they open the terminal connection over time.Glad to hear you got it fixed that's what we're here for.

today the p0882 code came back. i removed again the tipm and wiggled the wire that i fixed last time coming from the pcm to the tipm no code (p0882). i did the test when the ignition was in run position engine off i did not see code in the obd2 code reader.after that i said ok lets wiggle the computer connectors. when i did that strange things happend the obd reader did not want to communicate with the pcm , the anti theft security light was flashing and squares arround the PRND symbols in the dash.

is it normal ? or i have problem with the pcm connectors

Sounds like the wires the terminal tightness at the end of the connector opening or the tipm itself My best guess would be a open terminal end on one of the large main power feed wires.

i wiggled the pcm connectors. I had to disconnect the battery to let the strange events dissapear
how can i check for an open wire at the pcm connector ?
could it be a loose connector also?

You unhook the connectors and look at the Opening's and see if any of them look different then the others.Take pictures and post them.

today i Wiggled again the pcm harness connectors no issues. i think the connectors were not all the way in the male computer connectors. last night i disconnected the connectors and made sure i hear the clicking sounds of the connector seating right .
i did not take pictures because i did not want to generate more problems. but if the issue comes back i will take pictures and post them. i will wait few day and see

thank you so much

Your welcome were here to help keep us posted on how you make out.