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the problem i'm having is while driving at 60mph my pt decided to shift into 3rd or limp mode. i let the car sit for about 10 to 20 minutes and things are good... for a while. then here we go again. at first the alternator was only charging at 12.66 volts and the battery was good, according to the handheld code reader and charging tester. i replaced the alternator and things seemed to be fine for 3 days. but nope again here comes the gremlin. all the wires going to trans seem to have no corrosion. now alternator is putting out 13.6volts and battery is 12.3. i need help. i want to fix this not throw parts at it.
 

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P0700 is just the PCM telling you that a fault code is present in the TCM. That may be the P0882 code.
P0882 is the 'TCM input voltage low'. The new alternator seemed to make a difference. I have heard of broken/corroded wires in the harness terminals that can be intermittent around the battery tray. Anywhere around the battery is a corrosive area over the years.
13.6 is a fair charging voltage. What happens if you turn on the headlights and rear defroster?
12.3 is too low for a charging battery. It should closely match what the alternator is putting out.
I see a discussion here about a PT with P0882:
P0882 Low input signal - PT Cruiser Forum
I totally agree with diagnosing this first and not just changing parts without proof or confirmation. :)
 

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P0700 is just the PCM telling you that a fault code is present in the TCM. That may be the P0882 code.
P0882 is the 'TCM input voltage low'. The new alternator seemed to make a difference. I have heard of broken/corroded wires in the harness terminals that can be intermittent around the battery tray. Anywhere around the battery is a corrosive area over the years.
13.6 is a fair charging voltage. What happens if you turn on the headlights and rear defroster?
12.3 is too low for a charging battery. It should closely match what the alternator is putting out.
I see a discussion here about a PT with P0882:
P0882 Low input signal - PT Cruiser Forum
I totally agree with diagnosing this first and not just changing parts without proof or confirmation. :)
P0700 is just the PCM telling you that a fault code is present in the TCM. That may be the P0882 code.
P0882 is the 'TCM input voltage low'. The new alternator seemed to make a difference. I have heard of broken/corroded wires in the harness terminals that can be intermittent around the battery tray. Anywhere around the battery is a corrosive area over the years.
13.6 is a fair charging voltage. What happens if you turn on the headlights and rear defroster?
12.3 is too low for a charging battery. It should closely match what the alternator is putting out.
I see a discussion here about a PT with P0882:
P0882 Low input signal - PT Cruiser Forum
I totally agree with diagnosing this first and not just changing parts without proof or confirmation. :)
i have check all the connectors under the battery tray and all look good. the battery was checked by a scanner that will do a battery check. the battery was checked with the ac running the radio going, the lights on. i think this was the average voltage while it was being tested. i have read the post about the 882 code. the last time this occurred i did have trans code and i do not remember the numbers but i know one was input voltage to high and one that said voltage to low. how do i test to see if i have a short circuit? what is the 40/41 TE verification test and the pre-diagnogtic procedure? i do not plan on buying a miller 8815 test tool what can i do now
 

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i have check all the connectors under the battery tray and all look good. the battery was checked by a scanner that will do a battery check. the battery was checked with the ac running the radio going, the lights on. i think this was the average voltage while it was being tested. i have read the post about the 882 code. the last time this occurred i did have trans code and i do not remember the numbers but i know one was input voltage to high and one that said voltage to low. how do i test to see if i have a short circuit? what is the 40/41 TE verification test and the pre-diagnogtic procedure? i do not plan on buying a miller 8815 test tool what can i do now
 

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As long as your charging system is straightened out and functioning OK, you may be able to find this with a visual inspection and volt/ohm multimeter. The multimeter will check for shorts (low/zero ohms) and opens (high/infinite ohms).
The P0882 (TCM power input) concerns a single wire referred to as circuit T15. It comes out of the TIPM connector C2-cavity #10 as a 20 gauge Yl/Br wire, goes to an intermediate connector C102 and exits C102 as a Lt Gn wire to PCM connector C4-cavity #18.
Find these wires, disconnect the battery and test continuity from end-to-end. It should be less than 5 ohms between the TIPM and PCM. No opens. It also must not show any continuity to vehicle ground. No shorts.
 

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Ok the codes I'm getting on my pt cruiser. P128d trams control
Module power control circuit 2 open. P128b same as above except circuit 2 low. P128e same as above except over current. B2104 ign run/start 1 control circuit low. B218b ign run start 1 control circuit over current. Others. U1415 u1414 b1ba6 b212d b212c. P0700 and p0882
 

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I know this is an old thread but I just bought a 2006 PT Cruiser Turbo convertible and it was throwing P0700 and p0882 only when it was driven for a while. I’d drive it and then park. I would turn off the ignition, wait for 20 seconds and then begin driving. It only took about 30 yards before the engine light would turn on with the same two codes. When the engine was cold, I could drive it a couple of miles, turn it off and back on and I could drive it back home with no codes.

I read a post that they insulated the positive battery wires. There are two. So, I bought a heat shielding wire cover from O’Rileys and insulated the positive battery cables. I’ve driven it on two test drives of about 20 miles each. After the engine was warmed up, I’d turn it off and back on and drive some more. Guess what? No codes so far....

The previous owner replaced the ecm about 5 months ago. I’ll update this thread with updates if the codes come back.
 

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It’s July 16 and so far, no codes have surfaced since I insulated the positive battery cables. I haven’t driven it a lot but today I took it out for a 30 minute drive in city driving conditions and it was 90 degrees out. I stopped and turned the engine off and then started it again and drove about five more miles to my home without a code. There maybe something to this heat running along the battery cable to the fuse box theory...
 

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It’s July 24 and 108 degrees here in Texas. I’ve been driving the PT every evening without incident. Tonight, my daughter and I jumped in to go to the store and bingo, 10 yards from stop the engine light came on with the same two codes. I just cleared them with my reader and went on our way. I think this what I will continue to do until something falls off and I’ll know for sure what is going on. I still think it is a heat issue...
 

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. . .
I see a discussion here about a PT with P0882: P0882 Low input signal - PT Cruiser Forum . . . .
. . .
The P0882 (TCM power input) concerns a single wire referred to as circuit T15. It comes out of the TIPM connector C2-cavity #10 as a 20 gauge Yl/Br wire, goes to an intermediate connector C102 and exits C102 as a Lt Gn wire to PCM connector C4-cavity #18.
Find these wires, disconnect the battery and test continuity from end-to-end. It should be less than 5 ohms between the TIPM and PCM. No opens. It also must not show any continuity to vehicle ground. No shorts. . . .
This is an older thread that describes hints for solving your transmission error codes. Contributor ImperialCrown on July 10, 2016 gave a reference link to a discussion about low signal power at the PCM for transmission control. He also referenced a procedure for checking the input power wire to the PCM for transmission control. I have restated both of his comments above. I believe this is the solution to your specific issue.

Attached you will see images for the location of the PCM at the firewall for the PT Cruiser. The second image shows the pinout of connector #4 which carries all electrical signals to and from the transmission. If you check the wiring for corrosion, abrasion, cleanliness, etc and use the reference comments and schematic guides, you should be able to eliminate this intermittent electrical problem you are having with transmission control.

PCM Location at Firewall.gif Connector 4 PCM Pinout transmission.gif
 

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Thread, revival? I am having the same issues with intermittent P0882 code/limp mode. Clear it and I'm good for a week, but it keeps coming back. Removed the battery and checked the connections. The one that is harness to harness under the battery mount bracket looks good, but the 10 pin (with 5 or 6 wires) that plugs into the transmission is suspect in terms of the appearance of the wires. Does anyone make a replacement harness or repair kit for this 10 pin connector? I checked the TIPM and PCM and both have been recently changed. The PCM was reflashed and that did not seem to help. Any help would be greatly appreciated.
 

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These cars, and Neons, are very dependent on good connections AND good grounds. I bought my 03 PT GT with all of the grounds replaced with larger gauge wiring. I would check and clean all grounds.

Below is a list of grounds from the SRT4 site. Many are common with the PT GT.

"Misfiring and error codes-STR4

No pics, but grounds I just cleaned (got the p0340 today after rain, pcm reset didn't fix, cleaning grounds worked. I love the internet and this forum!):

- Wire bolted near passenger strut tower.
- Wire bolted near passenger side top corner of radiator.
- Wire bolted near drivers side top corner of radiator.
- Wire bolted near bottom front drivers side corner of fuse box (must remove airbox to get this one).
- Sensor bolted to head near cam sensor. This is behind and below the low pressure intake pipe. Clean where the bolt connects it to the head and the metal tab that the wire connector slides on to. Do this while the air box is off."

Here is the diagram for 04 PT sensors. Check out the sensor diagram upload_2018-11-10_20-35-50.jpg
 

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so to test circuit t15 with the p0700 and p0882 dtc codes, i need to remove connector #4 at the pcm and then remove connector #2 at the tipm, but i'm not exactly sure which one is connector 2 since they are labeled a, b, c, etc. in the tipm and where is the intermediate connector c102 located? if i don't have any continuity between c4 #18 and c2 #10 what is that indicated? is there a procedure to test for a bad relay in the tipm? sorry for all the ?s
 

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Po882 came back on after released the code ... finally in limp mode and you can actually feel rough shift ... I guess time to take em to a shop for new PCM module maybe ? Or maybe connector 4 green is bad .. who knows ...
 
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