I will do that tomorrow. Thanks so much I’m very grateful. Can you donate on this site or does someone have a charity that’s near and dear to them?
Sure I’ll get some funny responses 
I looked for a donation link at Car Talk and didn’t find one. You could PM @Julie-Lent-Managing-Editor and see if she can recommend a public radio station near you to donate the Cherokee to. She also has a thread about other donated vehicles with ‘Golden Vehicle Awards’ in the title.
I think Mstrlucky was thinking about a donation to support the site rather than actually donating the vehicle. A reminder, perhaps, of our collective luck in having such a useful resource that doesn’t cost us anything.
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Just curious, is the re-learn procedure in the owner’s manual?
I’ve had my battery disconnected for 2weeks. Have motor tore apart. Might charge it.
Suggest to re-charge the battery. Cranking the engine with a partially discharged battery – while it might still crank and start ok – that puts an unnecessary extra stain on the starter motor.
I def wasn’t talking about donating the jeep…lol.
I meant like$20-50 bucks.
Hello CT family
Well went to
autozone and this is what they came up with.
Ok so I’ve been researching and some of these codes can be from several different causes. If there I way I can reset the check engine light to make sure these codes still come up and they weren’t accidentally generated when I had my battery issue? THanks.
Your mp3 player and cell phone use flash memory, which is persistent [1]. Apparently the drive-cycle information in a vehicle is kept in volatile RAM.
If I had to guess, drive-cycle information is kept in RAM due to flash memory’s limit on write and erase cycles before memory cells begin to wear out.
[1] Volatile RAM is used for running the programs in those devices, but not for the storage of the operating system, photos, songs, etc.
Well I did this process I say on line where you turn car on but don’t crank and press the gas pedal three times then turn car off then start it . The check engine light went off and has stayed off but haven driven it yet so maybe it’ll come back on . Idk.
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Keep us informed please…
I’d take it out for a few half hour drives, some on the freeway.
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According to Google
USB flash drives can withstand between 10,000 to 100,000 write/erase cycles , depending on the memory technology used. When the limit is reached, some portion of the memory may not function properly, leading to lost of data and corruption.
Wouldn’t that be enough?
I believe that limit would be reach quite quickly.
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Presumably the programmer would transfer the stored data from flash to normal volatile memory after the car was started, then would store it back to flash when the car was turned off. I presume my portable mp3 player uses a similar method to remember which song I was playing and how many minutes into the track when I turn it off, and starts at that point the next time I turn it on.
But there may be some add’l issues with cars making a comparison to mp3 players difficult. If so, I wonder what they are?
Before flash technology became common computer used battery powered cmos memory to hold needed system parameters when the computer wasn’t turned on. I don’t think that sort of memory degrades with use. They wouldn’t the cmos memory for data for routine calculating, data that is constantly changing, b/c that would tend to run down the cmos battery. Cmos memory uses very little current draw as long as the data remains constant. Battery tended to last 10-20 years.
What about all the data that is continuously being collected as you drive down the road?
The real time data collected is stored in regular memory. It is only stored back to the flash when the car is shut off. And if the data in the flash was the same, no need to even store it back then. If the normal memory lost its data before they had a chance to store it to flash, they’d just revert to the prior day’s data.
Are you saying this is how it’s done, or are you saying this is how they should be doing it?
That’s how I’d do it. I don’t see any reason the needed engine parameters aren’t saved in some sort of non volatile memory. The objective being to not cause unnecessary jobs/issues for the car owner when they are simply replacing the battery, or if the battery accidentally goes flat. The car owner should be able to replace the battery or charge it, and drive on as before. Can you think of any fundamental reason this isn’t possible?
@jtsanders thanks for tagging me. 
And @mstrlucky74 Yes, you can donate through the Car Talk site.
There are a few links from the Car Talk homepage, but here is the direct link to the Car Talk Vehicle Donation site, for your convenience.
There is a phone number on the page too, to get it started.
Good luck!
j