Question about 1997 Honda Accord

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I changed the battery and now my car cannot pass emissions test because computer has to be reset. I have driven car 200 miles already and computer has not been reset.

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Take battery cable off for roughly two minutes it resets it

Posted on Jul 29, 2009

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I replaced battery but now it won't pass emission test because the "Drive Cycle" wasn't reading. What do I need to do to "read"?


Your vehicle needs to relearn itself, and run tests on the emissions equipment.

Your car is a rolling smog machine. The law requires that the computer test ALL of the emissions parts regularly.
Items such as engine sensors and misfire counters can easily be checked by virtue of the engine running. But SOME components aren't computer components. So to test them the car must be driven for a period of time, in a certain manner so that the computer can test them (fuel cap, catalytic converter, EGR valve, etc.).

When you disconnect the battery, the computer loses the results of the last test (pass or fail) and registers a "not ready" status during the test.

Most of the techs can manage to clear nearly all of the MONITORS in less than 10 miles or so. To see how this is done, do a "Google" for OBD II DRIVE CYCLE, and read the procedure.
If you are unfamiliar with this protocol, simply drive your car for 50-100 miles or so, but not all at one time. It needs some cold starts, some warm-up time, some stop and go and some easy freeway cruising. Then take it back for re-test.

Oct 17, 2015 | Chrysler Pacifica Cars & Trucks

1 Answer

How many miles do I need to drive to complete the drive cycle


hi
generally the catalic converter get oily especially if the car is used
around the town the best thing to do from past experience is to drive the car down the motorway at 60mph. for good 3/4 hour at high revs
third gear if 4 gear motor you get the meaning this way you burn the oil
out because lots more heat is crated once this is done youshould pass the emission. happy driving

Feb 18, 2015 | 2001 Mercury Sable

1 Answer

Have 2003 Kia Sorento EX, sat for couple months, then changed batter to pass emission test. Test said not ready due to computer needs to be reset, how far do I have to drive to reset computer?


I think you mean drive cycle not complete.
Generally the van needs to be driven 50-100 miles at both city and highway speeds. The distance needs to start when the engine is at operating temp, and the speed needs to vary including stop and go city. It does not have to be all in one trip but the engine must be warmed up first.

Feb 15, 2014 | 2003 Kia Sorento

1 Answer

How many miles do i need to drive to have the computer re-ready to accept obd codes?


200 miles is more than enough. p0420 is a cat code meaning the cat in the exhaust is not doing its job. you need to make sure there are no exhaust leaks before the downstream (last one) o2 sensor. if you can get all but 1 monitor to set without the check eng light coming on, you will pass pa emmissions.

Jun 30, 2012 | Suzuki Cars & Trucks

1 Answer

Building emissions history to pass smog test


if you are failing emmissions test your evaporator canister is expired replace it and then you and your car will get a green light

Dec 31, 2011 | 2000 Ford Escort

2 Answers

My 2002 Grand Prix GT 3.8L Won't pass emissions. Testing center's scanner says car was recently worked on and that the mileage driven since is not enough to recycle check engine light. The ck eng. light...


Nope, you just need more miles. When the car's computer has been disconnected from power (such as when the battery is unhooked), it'll set what are called "readiness codes" when power is reapplied. It takes a certain number of miles to clear these - some cars require 50 miles, some 100 miles, and some (such as some Isuzu models) need very specific drive cycles to clear them. Once the requisite number of miles have been driven without issues, the readiness codes will extinguish and your car should pass.

Dec 10, 2009 | 2002 Pontiac Grand Prix

1 Answer

Failed TN emissions testing. 1996 Mazda


the computer needs to be reset by performing a code erase then drive 500 miles

Sep 23, 2009 | 1996 Mazda Protege

1 Answer

I changed the battery and now the computer won't "reset"


Did you change the Batt right before the emissions test? If so bad idea. Yes the car needs to be driven for some time before the computer sets up timing fuel and spark carrectly. Drive some more then try the test again, should be ok and pass

Dec 28, 2008 | 1997 Nissan Sentra

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