Intermittent PCM power loss

Unfortunately, it appears that Chrysler has not supplied that information. At least not anywhere that I can find it. From my research, the P1603 code is the one to address. It points to an internal fault in the PCM. That fault is also probably the cause of the p0882 code (from the TCM). I am including what information that has been provided in the images below. Hope it helps.

Hmmm Honestly the best that I can tell you is that you need to start from the beginning again. I would do the test suggested in the images to see if the PCM is bad and then go from there. I'm betting on a problem with it.

That tool is a PCM pinout tool, and it costs about $300. Here is a link to one: https://www.handsontools.com/Miller-Mopar-Tools-8815-1-PCM-Pinout-Box-Adapter-_p_35916.html. Short of buying that, the best thing that you can do is to follow the wiring yourself and closely inspect it. In particular, look at the power and ground circuits. You can also use a multi-meter to check resistances along those same circuits. Excessive resistance means that there is an open circuit. Repair it and your problem should be solved. If you cannot find any problem with resistance in the wiring, then your issue is in the PCM itself.

Honestly we're a little out of my comfort area here. I'm going to phone a friend and see if we can come up with what you're referencing.

Ok here's what I found out. What you're talking about is a Terminal test set / drag testers. Basically a set of wires with the known size of connector pin on the end. They come in handy for things like loose relay sockets, loose ECM wiring and more. Useful on the weatherpack and metripack style multi-pin connectors where one of the pins may carry a lot of current and overheated the spring tension or someone has been probing the pins with a bit of force.

https://www.aeswave.com/uTest-Advanced-Terminal-Test-Kit-p9573.html

You can make a set yourself. The way to make them is to strip a few connectors. Pick out the male pins that are clean and you have some drag test pins. You can buy lab quality ones that they use in the factories when making the connectors but those are solid metal shaped sort of like a multimeter probe. They are not field friendly because you need to be VERY careful inserting them and they are un-insulated.

This is almost word-for-word what I was told. Hope it helps you out.

Please do tell us what cleaner you used. Especially if it works.

Good to know. I'm going to store that little nugget of information in my head. Thanks.

Here's your thread from a couple of years. The info is still good. https://www.2carpros.com/questions/2006-chrysler-pt-cruiser-p0882

Check the power and grounds to the pcm

Usually that means that there's some corrosion in the power circuit somewhere (either in the hot lead or the ground lead), or some other type of problem with the power or ground. There pretty much has to be something going on there. I know you did it all a while back, but since the code went away for as long as it did, you kind of have to start the diagnostic process over. It's a pain, but that's the best way to do it.

Sorry I just got the message. Seems like one of the wires must have a weak connection. Whatever you did might've tightened up or just gotten into a good position temporarily. Cross your fingers and hope the code stays away