Resetting The Computer - Hyundai Forums : Hyundai Forum
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#1 Old 03-26-2007, 12:19 PM
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Devans3449
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just had some work done on the car,the battary was disconnected and reconnected. just went thru a car inspection and no codes are registering. they told me to drive a few miles and return. any idea how many miles i need to drive to reset everything?
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#2 Old 03-26-2007, 07:33 PM
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SuperChris
I just went thru this 2 weeks ago. I reset my CEL with my scanner just before inspection. I put in a concical air filter that gave me some extra get-up but a CEL to boot. Winter time and cold cold air make the engine run lean with this kind of filter. I had to put the stock airbox back on and drive. It took me a weekend to get everything back online. 50 Miles should do it.

The emissions codes need some drive time to make readings before your tests can be done. There are 4 sensors involved and most states require 3 before you can pass. The 4th one is the heated o2 but obviously the car has to be hot before that one can be checked.

Get to driving...and it has to be for a period of time...not 10 trips to the store down on the corner.

Chris
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#3 Old 09-18-2007, 09:18 PM
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I have this problem also with my 2001 Sonata GLS V6. Last Friday I went for an inspection (I live in NY), and after the mechanic connected my OBDII connector to his computer it gave two messages:
[b]Catalyst - not ready
[b]O2 sensor - not ready.
I was asked if I disconnected battery or did something else. No, I didn't do anything, last time on June the dealer replaced a timing belt, and since than I made over 2000 miles.
Then, somebody gave me an advice to check battery voltage while cranking. Yes, it dropped to 2V! Since the battery was original, 6 years old, I went to autoparts and replaced battery with new one.
Now, it's 2 days already and over 80 miles since I drive with new battery. I checked the car with "Scangauge II" scanner and it still showed "no codes found, not ready". Does anybody knows how long/how many trips/how many miles I have to drive to get it "ready"? Or I have some problem with the ECM?
Thank you.
George
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#4 Old 03-30-2009, 05:37 PM
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pynchon69
Right now, I have the same problem. Any answer for that? How many miles should I pot on the car to clear the the computer?
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#5 Old 03-31-2009, 02:16 PM
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azncoic
I am having the same problem on my '00 sonata. Cleaned off the battery posts and now my scanner says EVAP not ready. I have already driven 66 miles, and stopped and started over 30 times and it is still there. I don't get a CEL but it won't pass AZ emissions unless all systems are ready!

I have searched on the i-net and Alldata doesn't show much for it unless you have a code stored. I remember I worked on an older elantra and Alldata said it had to run 15-20 miles at freeway speeds for it to run the check.

Hopefully someone can tell me how to fix this.

As far as the o2 and catalyst tests. The o2 should read ready within 1 min, if not replace the sensor as the heater is bad. The catalyst(catalytic converter) will take longer if the engine has cooled down. It should read ready within 5 mins of driving. If not either the downstream o2 sensor is bad or the cat is.
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#6 Old 03-31-2009, 04:55 PM
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QUOTE (kjlee @ Mar 30 2009, 04:37 PM)
Quote:
Right now, I have the same problem. Any answer for that? How many miles should I pot on the car to clear the the computer?
Here is what you should do. Hyundai recommends special drive cycle to set your on-board computer READY for inspection (see attached file). Try to complete this and then check if your computer is ready. I actually did this but I can tell you - it's pain in the butt. You have to find some empty highway to do that. Oxygen sensor I had to replace anyway.
Btw., I no longer have this car, traded-in for 2009 Sonata just last weekend.
Attached Files
File Type: pdf Web_Posting_Non_Delphi_Drive_Cycle.pdf (83.7 KB, 693 views)
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#7 Old 04-01-2009, 05:25 PM
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pynchon69
Unhappy

My 2001 Sonata GLS has the same problem, too.
The mechanics at a dealershop keep saying that there is nothing I can do but running... In the mean time, I ran more than 600 miles and went back to the dealershop every morning in vain.

Recently, I found the "drive cycle" and one man from California did drive exactly as was instructed by the drive cycle manual.
I believe that it'll be somewhat dangerous to drive that way. So, I'm thinking about "driving" my car with the front wheels lifted up. Then I can "run" without moving my car. Will this idea work? Is there any other thing that I should take into consider?
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#8 Old 04-02-2009, 08:30 PM
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n2ho
QUOTE (kjlee @ Apr 1 2009, 04:25 PM)
Quote:
My 2001 Sonata GLS has the same problem, too.
The mechanics at a dealershop keep saying that there is nothing I can do but running... In the mean time, I ran more than 600 miles and went back to the dealershop every morning in vain.

Recently, I found the "drive cycle" and one man from California did drive exactly as was instructed by the drive cycle manual.
I believe that it'll be somewhat dangerous to drive that way. So, I'm thinking about "driving" my car with the front wheels lifted up. Then I can "run" without moving my car. Will this idea work? Is there any other thing that I should take into consider?
I don't know about "driving" the car with the front wheels lifted up, but Hyundai's recommendation is "This schedule is best driven on a dyno if available, otherwise find the best road with least traffic". The dealership also told me to just drive and they were unable to help. I found a very quiet long highway here, on Long Island, NY, and ran there this schedule a couple of times, trying to follow recommendations as close as possible. Then... check engine light came on, I went to the dealership and my oxygen sensor was replaced. After that car passed inspection with no problem.
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#9 Old 04-08-2009, 10:42 PM
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n2ho
QUOTE (kjlee @ Apr 1 2009, 04:25 PM)
Quote:
... So, I'm thinking about "driving" my car with the front wheels lifted up. Then I can "run" without moving my car. Will this idea work? Is there any other thing that I should take into consider?
[b]Don't do this. I've read in the Michelin booklet that "Do not spin free running wheels in excess of 35 mph. Excessive speed in a free-running, unloaded tire can cause it to explode from centrifugal force". [b]Very dangerous.
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#10 Old 06-06-2009, 10:34 PM
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jrthomas100
I had my O, C and EV OBD readiness settings fail a recent inspection after I had disconnected my battery to replace a radio. I drove my car for 700-800 miles (but never for more than 70 miles continuously) without clearing any of them. I finally took my car out for a 150 miles CONTINUOUS drive on the highway and the O and C readiness lights finally set/ cleared. Still have got the EV set yet, but still trying. Good luck!
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