Installed used pcm, now MIL on

Lazer Owner/Technician New Jersey Posted   Latest  
Resolved
Programming
2005 Dodge Grand Caravan SXT 3.8L (L) 4-spd (41TE)
P0406 — EGR Sensor "A" Circuit High
P0403 — EGR "A" Control Circuit/Open
MIL On

Hi I replaced the pcm with a used one, and now it has codes for egr. This vehicle does not have egr, is it possible to flash this pcm to not have egr or must I replace it? Thank you.

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Cody Mobile Technician
Arizona
Cody
 

You will need to hook original pcm up and pull calibration info out of it to download the proper file from tech authority. You can also compare the new pcm calibration info to the Chrysler pdf of flash files.

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Lazer Owner/Technician
New Jersey
Lazer
 

Thank you, I don't do programming yet just diagnostics. The shop I'm working for doesn't have old pcm, just want to make sure if I call a programmer he will be able to change it.

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Jorge Mechanic
New York
Jorge Resolution
 

To be honest, just get the correct part number. Unless you’ve used witech 2.0, you will be running through hoops plus spend over $100 to program an old PCM. Now, if you needed updated for some tsb or a specific problem, then I would do it. That’s just me. Thank you

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Manny Owner/Technician
California
Manny
 

Ran into same thing before and ended up getting a used PCM with same numbers like Jorge said. It’s so much easier.

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Michael Mobile Technician
Utah
Michael
 

In order to change the calibration type with a PCM that is the same hardware, you have a couple of options. 1) You can hotswap the PCM from original to replacement during the programming process. 2) You can use the J2 patch from APNT to force the Chrysler J2534 application to accept the file you have in the low folder. You can then download the needed files from Techtools using your Tech…

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Jeff Owner/Technician
Arizona
Jeff
 

You don't need any special “patch”. Just download the correct calibration and edit the current calibration ID into the “.jpart" file with a text editor. That flash it the normal way.

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Michael Mobile Technician
Utah
Michael
 

Jeff, Yes, I apologize, that is another way to do it. I failed to mention it. I was trying to relay that just downloading the correct file will not work. As the J2534 app will not accept a file not in the jlpart table without manipulation. As far as I know Witech will not install the correct file either. Thank you for the correction.

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Jeff Owner/Technician
Arizona
Jeff
 

Probably also worth noting that if the hardware is not correct (there are a few different “species” of NGC3 PCMs), bricking is always a possibility. As a side note, I've found that the VCMII is the best j2534 device to use with the old Chrysler flash utility - it is the most likely to complete the process without dropping out.

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Lazer Mobile Technician
New Jersey
Lazer Resolution
 

Thanks for all the responses I really appreciate it, I'm going to do like Jorge suggested and get the correct pcm.

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Kerry Mobile Technician
Ohio
Kerry
   

Be cautious about security when finding your new (used ) pcm. In 2005 there were still a lot of black key, no skim, minivans built along with gray key security option. Since it sounds like you did plug and play on the current one, you probably have a black key? If you purchase one from a gray key car, you will have another hurdle to get running. You said you don't do programming but even if you…

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Robert Technical Support Specialist
New York
Robert
 

Theft alarm vs no theft alarm PCM swapping has been a problem long before 2005 model year there was a DMail sent to dealers to stop swapping modules because Chrysler was warrantying too many PCM's do to learning theft alarm after being swapped from a non theft car into a theft car, same keys back in the 90's so no real way to tell RKE vs a theft alarm vehicle aside from the security light on the…

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Kerry Mobile Technician
Ohio
Kerry
 

Agree....I get cautious on 96-02 or so for the VTSS (not skim) security gotcha that will enable VTSS in the BCM by virtue of introducing a VTSS enabled PCM to a non-VTSS vehicle. Then your stuck with a BCM that will inhibit starting because its never going to see a "disarm" signal because its not wired and/or equipped (door switched etc) to. I've been able to sort this out ahead of time usually…

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Dwight Owner/Technician
California
Dwight
 

Disabling Dodge alarm systems Over the years I have read enough horror stories about Chrysler PCM (old style no CAN vehicles). Like swapping it from another car for testing purposes and now the donor has not start condition. It happened because of VTSS system. This system is optional and could be turned on by DRB III but could not turn off once enabled. Option is sitting in a body computer and…

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Lazer Mobile Technician
New Jersey
Lazer
 

Kerry I had a grey key but I was able to program the pcm by disconnecting the skim module then writing the Vin with my scan tool, then reconnecting skim module and it started right up.

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David Mobile Technician
Pennsylvania
David
 

How far are you from NE Philadelphia/Bensalem Pennsylvania area? I might be able to help you out.

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