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Question (Category: 0)
My 2001 Chrysler PT Cruiser shows a P0602 (Internal Control Module Memory Check Sum Error). I had the PCM reprogrammed by an aftermarket shop in Davie, Fla. The guy there advised me to replace the battery with a cheap one and do so every two years. Does this make sense? He said:a) I should first install a new battery ( current MOPAR battery is 4 years old but still in top condition, hasn't been used in a month but still retains full charge)then install the PCM and start the engine and run it in place for 25 min.b) He also said I should replace the battery with a cheap one from say, Pep Boys every two years, rather than getting a good one and keeping it for 4 or 5 years.
Info Request
I have a problem with the fact that you said they reprogramed the pcm. I had a pt in my shop and had to get a new pcm from Chrysler because they said it could not be reprogramed. In total disbelieve I called Cryslers main office and they told me the same thing no reprograming was available. As for replacing your battery with a cheap one that will only cause you problems. You should always use a good battery. Low voltage will cause more problems with the pcm. If this person can reprogram pt pcms then i need his number I have 2 that I would love to have reprogramed.
Customer's Reply
Code p0601 is caused when the pcm gets incorrect data in the software. Has the p0601 code returned after reprograming the pcm?
Info Request
OK, I can send you the reprogramming shop39s address in Davie, Fla if you send me your email address or phone, whatever. These people are on eBay too, I went there in person and they do a brisk biz.Now , what kind of problem is the one I have, namele P0601 INTERNAL CONTROL MODULE MEMORY CHECK SUMquot? could it have been caused by a battery running low on amperage power since the car had not been used for a number of mos. the battery went dead some 3 to 4 times and we recharged it with a Sears battery charger?
Customer's Reply
Sorry my query was resolved by another mechanic, I thought you had dropped my query just like the first guy who took it did. Don39t yet very well know the ropes here, this is my first visit here. Thanks anyway
Answer
good bye, matter resolved by another technician, please sign off
Customer's Reply
Is there anything that I can help u with?
Info Request
say jamie, i did not get your reply as to what kind of problem this P 0601 code is all about? or what kind of problems may it cause? i told you about my AC causing engine to overheat after 15 or 20 min of running the AC but you did not address it?Is this P 0601 code serious trouble or what, the car runs just fine except for the AC overheating after 20 min use..?psi have to lookup the Davie shop address, but I do have it..
Info Request
I am sorry for the delay getting back to you , there was a problem with my pc and it would not let me respond to you. As for the over heating problem It sounds like the fans are not working when you ac is on. Does it over heat wile you are driving or just at stops or sitting?
Customer's reply
no thanks, XXXXX XXXXX resolved and payed for last night with another technician, sorry to say but your answer was off target. Chrysler PCMs can be surely be reprogrammed. I am living proof and witness to that. By the way we installed the reprogrammed PCM this morning, worked fine, P0601 error code is now gone..
Answer
humm a 601 is not a software issue a 601 is a EEPROM failure one of the 3 ships that are in the pcm hardware like a CPU in a computer the 601 means internal chip failure reprograming it or updating the pcm will turn off the light but it will come back I can assure u of that. the only way to correct this issue is to replace the pcm with a new or re manufactured pcm.SympXXXXX XXXXXst:P0600-PCM FAILURE SPI COMMUNICATIONSP0601-PCM INTERNAL CONTROLLER FAILURETest Note: All symptoms listed above are diagnosed using the same tests.The title for the tests will be P0600-PCM FAILURE SPICOMMUNICATIONS.When Monitored and Set Condition:P0600-PCM FAILURE SPI COMMUNICATIONSWhen Monitored: Ignition key on.Set Condition: Internal Bus communication failure between processors.P0601-PCM INTERNAL CONTROLLER FAILUREWhen Monitored: Ignition key on.Set Condition: Internal checksum for software failed, does not match calculated value.POSSIBLE CAUSESPCM (INTERNAL OR SPI)TEST ACTION APPLICABILITY1 The Powertrain Control Module is reporting internal errors and must be replaced.View repair.AllRepairReplace the Powertrain Control Module.Perform POWERTRAIN VERIFICATION TEST VER - 1.


Answer by Matt D. (Purchased 4 times and rated )