After a CEL has come on and the problem is fixed, does removing the neg. terminal on the battery for an hour or so actually reset the codes/computer?
Or, do you HAVE to use a diagnostics tool?
Actually removing the negative battery cable for about 10 minutes completey resets the computer.
Keep in mind it may drive funny for a bit as it relearns everything, idle, acceleration etc.
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Rob S wrote:Actually removing the negative battery cable for about 10 minutes completey resets the computer.
Keep in mind it may drive funny for a bit as it relearns everything, idle, acceleration etc.
Sometimes it takes over an hour, mine took over 3 to reset.
The scan tool is the only way to completely reset the computer. Unplugging the battery holds on to the learned fuel tables and in-memory dtc's. Pulling the battery resets the continuous and non-continous test results, resulting in the MIL to go away, and the computer to need to go back through the testing cycle.
The MIL will also go away if you can complete a full test cycle, I forget where the instructions are, but it would take about 30 minutes of driving at different speeds.
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Shifted wrote:The MIL will also go away if you can complete a full test cycle, I forget where the instructions are, but it would take about 30 minutes of driving at different speeds.
Perhaps a little off-topic, but could you elaberate on this? I'm intrigued.
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Ok, so I realize this is a 3 year old post but I was just looking for some clarification on this "resetting" thing and this was the best search result.
From what I understand, if you do certain mods without having any way to tune, than in order to take full advantage of the mods the best thing to do is to disconnect battery for a while and re-connect? Causing the computer to re-learn what amount of air is being taken in, what has changed etc. and running "better"?
In my case what I mean by mods are short ram air intake, bigger TB, header back exhaust.
Or, does disconnecting the batter reset some other sort of computer that has no impact on this stuff?
Just press control + alt + delete
When your "modding" a car... you should have the battery disconnected anyways... so the point is moot.
The car will have to "re learn" a little bit either way... so it honsestly doesn't matter..... the car will end up running the same in the end either way.
Besides.... without retuning the car.... the computer doesn't actually "adapt" to mods like a lot of people think it does.... no matter what you do to the car.... the computer still thinks that it is stock when your running a stock tune and any corrections it tries to make will be done thinking that all the stock parts are on the car..... if if you do enough to the car for this to be a real concern... you'll need a tune anyway.
Thank you very much. That's exactly what I was looking for
