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#1 Old 10-05-2007, 11:46 AM
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Resetting computer

I purchased a 2005 Altima 2.5 SL, auto tranny, with 26,000 miles and have put about 6,000 miles on it. I'm wondering if it would be worth it to reset the computer by disconnecting the battery for 5 minutes. Is the computer adaptive and does it remember the driving patterns of the 1st owner driver? I know if you install a cold air intake, that you should disconnect the battery so that the computer will recognize the new air/fuel mixture. Just wondering if the driving patterns of the 1st owner of my Altima are remembered in the computer. If I do disconnect the battery to reset the computer will the radio lock-up and have to be unlocked with a code. Thanks.
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#2 Old 10-05-2007, 01:09 PM
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Yeah 5 mins is not going to help you reset the comp in our car neither is unplugging e battery for 24 hours you have to do the whole insert key push on the gas pedal in a certain pattern and hold your breath to see if it worked. There is a pst on how to do it just use the search button. As for the whole deal just drive the car normally for yourself and it will learn how you like to drive.
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#3 Old 10-06-2007, 06:38 PM
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SERBoard.com :: View topic - ECU codes and reset procedure Here, use this. It takes patience, but does work.

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#4 Old 10-07-2007, 06:01 PM
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Long flashes (0.6 seconds) indicate the first digit of the code; count the blinks one through nine and write down the first digit. (Ten blinks indicates a zero.)
The next three digits follow in turn in the same fashion except with faster blinks (0.3 second) and a 1.0-second pause between digits.
By "the same fasion" do they mean by doing the WHOLE thing over again for each digit?



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#5 Old 10-07-2007, 07:46 PM
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Originally Posted by mikethemike View Post
By "the same fasion" do they mean by doing the WHOLE thing over again for each digit?
Nope, it means the first digit blinks slower than the last three.

Something like:
1st digit - blink ............... blink ................... blink =3
2nd digit - blink blink =2
3rd digit - blink blink blink blink = 4
4th digit - blink blink blink blink blink = 5

I also believe that it repeats, but don't quote me on that.

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Last edited by DryHeat; 10-07-2007 at 11:23 PM.
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#6 Old 10-07-2007, 10:41 PM
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Originally Posted by AceCombat View Post
As for the whole deal just drive the car normally for yourself and it will learn how you like to drive.
interesting...
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#7 Old 10-08-2007, 04:10 AM
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Yes, it continues to repeat until you stop the procedure by turning off the key. Unless of course you have multiple codes. It will continue to repeat them all, so don't shut it down too soon, because you may have more than one or two. As soon as you start getting the same code signals repeated, then you can reset.

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#8 Old 10-09-2007, 12:19 AM
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Originally Posted by Eisenhower View Post
interesting...
Why do you say interesting, it is true. Take 2 cars exactly the same and drive one all nice no romping on the gas and it will act like a slush box compared to one that is used to having the throttle mashed. The computer store the info on your driving style and use that as a base line for you rvalve timing fuel mixture and on automatics where to put shift points approx. Mine drove like a granny car for about a week until it learned my driving style.
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#9 Old 10-09-2007, 02:31 AM
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I say "interesting" because these cars are getting smarter all the time. I mean, cars that pay attention to your driving habits- and adjust...
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#10 Old 10-10-2007, 02:19 AM
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thats actually kinda cool.
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#11 Old 12-18-2007, 07:22 PM
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has anyone ever had a the P0420 code?
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#12 Old 12-18-2007, 09:19 PM
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That code is for, on the 2.5, I believe, the precat. Are you using oil? If so, your engine may have ingested the precat which means the engine may need to be replaced. Also, check to see if the precat recall was done on your car. That recall came out for 02-03 models like about 3 or 4 years ago. In some cases people never had any trouble after the recall was done. Some ended up still having a precat trash out and needed a new motor. Good luck.

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#13 Old 12-18-2007, 09:34 PM
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well, the problem was that i brought it in for the CPS recall. they said they cant do the recall if the SES light is on. the codes they pulled were:
P0420 - catalytic converter and O2 sensors
&
P0302 - leaking headgasket, cylinder 2 misfiring

and that pretty much puts me SOL. est the repairs to be approx $2300, which i dont have.
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#14 Old 12-18-2007, 11:01 PM
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Quote:
Originally Posted by Griffin View Post
well, the problem was that i brought it in for the CPS recall. they said they cant do the recall if the SES light is on. the codes they pulled were:
P0420 - catalytic converter and O2 sensors
&
P0302 - leaking headgasket, cylinder 2 misfiring

and that pretty much puts me SOL. est the repairs to be approx $2300, which i dont have.
Hold up. How many miles are on your car?

Edit: If under 80k it may be covered under the Federal Emissions Warranty. Check your Owner's Manual to be sure.

Quote:
Federal Emissions Warranty
The Federal Emissions Warranty guidelines are based on federal regulations and apply to vehicles in all 50 states. Vehicles are covered by two types of emissions control system warranty, "Emission Defect Warranty" and "Emissions Performance Warranty".

The Emissions Performance Warranty is usually for 3 years/50,000 miles and depends on the state where you live. The Defect Warranty is generally consistent with the manufacturer's bumper-to-bumper warranty with certain parts (catalytic converter and electronic emissions controls (PCM) for up to 8 years/80,000 miles

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Last edited by DryHeat; 12-18-2007 at 11:05 PM.
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#15 Old 12-19-2007, 03:47 AM
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