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How do you reset the computer after you hook up the battery?

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Normally use a code reader to reset the CPU to fix any corrupted programs

Posted on Dec 29, 2013

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Posted on Jan 02, 2017

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How to reset the computer in a 1998 Concors Deville


As far as resetting the computer, just disconnect one of the battery cables from the battery for a 24 hour period. When you re-hook it, the computer should have cleared and your good to go. This has worked for me to clear some codes.

Jun 09, 2017 | Cars & Trucks

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Voltage draw down found!
1) repaced bad battery
2) rechecked voltage draw...


Voltage draw down found!
1) repaced bad battery
2) rechecked voltage draw still showing 12 volt drain with all under hood fuses, relays, and interior fuses and relays pulled.
3) Computer was the 12 Volt drain, & had to reprogram itself.
4) gave the new battery a good long charge, reinstalled the battery into the vehicle.
5) Hooked the battery up, pulled the keys out of the ignition, close and lock all doors with auto door lock. Waited minimum of 20 min so the computer would go back into the sleep mode.
6) after 20 minute wait, rechecked the voltage draw by removing the neg battery cable from the battery, hooking volt meter + lead to battery cable end, and neg lead to battery neg post, nothing showing or zero reading.
7) Hooked the neg cable up to battery, started the truck and let the engine idle to normal run temp, then fast idled 1200-1300 rpms for 2 minutes, then drove the vehicle for 5+ miles and alternating speeds. All appears back to normal now. Alt showing 14.2 to 14.4 volts, and no other problems.
After all of the afore mentioned, my problems began with a bad battery cell, thus caused my computer to have the memory reset.Until the computer was reset, I had a 12v continious draw down! I got this info from a repair manual, that I purchase sometime ago. Thanks for your alls help........EJB

on Dec 30, 2011 | 1996 GMC Yukon

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Mil/check engine light due to obd communication failure


Disconnect your battery. Touch the two battery cables together. (make sure they are not in contact while hooked to the battery). Then leave the battery disconnected for 10mins. Connect battery again. This should reset the computer. Sometimes lights my be on until you drive the vehicle a short distance, then it resets.

Oct 03, 2013 | 1997 Dodge Caravan

1 Answer

How do i reset security system on 02 bmw x5


Disconnect the battery for a minimum 24 hour period to allow computer time to reset. Then hook the battery back up.

Jan 02, 2013 | BMW X5 Cars & Trucks

2 Answers

Need to kno where the reset buttom for the computer is for a 01 neon


there is no reset buttom on computer for that car why do you want to reset computer is it becuse of check engine light take of your ground cable of battery for one minute that will reset your computer on car ok hope this helps ok

Nov 27, 2012 | 2001 Dodge Neon

1 Answer

Computer needs to be reset


Unhook the battery for two minutes on the negative side,then hook it back up. It will take a complete drive cycle for the computer to "relearn" everything,which takes between 45-60 miles of driving.

Sep 23, 2012 | 2008 Jeep Liberty

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Won't start, back fires, engine knocks, spitting black smoke. can't hook up to computer because it wont start and getting a new battery will reset the computer in the truck.


i dont need to be started to hook up computer. also something that bad will show codes even after changing battery if you crank it a bit.sounds like a cam or crank sensor problem though or engine got wet

Apr 28, 2010 | 2004 Dodge Ram 1500

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Anyway to hook up an amp power wire w/o unhooking battery?


There should be a large red wire going to your fuse box under the hood. You can put it there. You can unhook your battery also your computer should be fine. Think about it if everytime someone changed a bad battery they would have to go to dealer not true. What you have heard some older cars the computer can be reset by removing the negative. I take the positive off all the time on cars your age and have never had any problems

Dec 03, 2009 | 2000 Chevrolet Cavalier

1 Answer

Looking for a reset switch after you disconnect the battery


There isn't one. By disconnecting the battery for an hour or so, you allow the capacitors in the computer to drain. When you hook the battery back up, it automatically puts the computer into relearning mode, which essentially is a reset of the computer.

Nov 14, 2009 | 2002 Pontiac Grand Am

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When i change the airag in my truck do i have to have the computer reset or can i simply unhook the battery change the airbag and then hook the battery back up


Disconnecting the battery resets the computor anyway, so you don't have to have it reset.
Also pull the fuse for the airbag.

Aug 26, 2009 | 1996 Dodge Ram

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