Question about 2000 Pontiac Sunfire

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I had my car fixed and it still will not pass a smog test because apparantly the computer needs to be "reset". The mechanic told me just to drive it awhile and it would reset, but after 100 miles it has not. I did this once before and was told that there was a series of things I had to do to reset it and that worked, but now I can't remember what that was called.

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My pontic sunfire 2003 engin light is all the time .what can i do about it

Posted on Aug 19, 2010

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Reset computer on 2002 ford expedition. fuel pump has been replaced and has new battery. need to pass smog.


What ? the monitors aren't set ? Need to do drive cycle to get them to set . Do you have a check engine light lit ?

Ford Motor Company Driving Cycle

Apr 04, 2017 | Ford Cars & Trucks

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My 05 ford focus Zx3 2.0L I went to smog for twice still don't passed the smog test the reader said cat is not ready evap is not ready 2 air is not ready what I have to do


Did you disconnect the battery recently? Or have the car worked on to correct a check engine light problem? And they reset the codes?

When this happens (loss of all power or code reset), the computer will run all its tests on all systems, and set a 'ready' condition when the tests are passed. Some tests require multiple 'drive cycles' or specific conditions (less than full tank of gas but more than 1/4 tank) to complete the test. Until all (or a specific number - some non-critical tests may be exempted) tests are 'ready', the car will not be passed. The assumption being that until a test is successfully completed, the computer may discover a problem with a system, one that would fail the smog test.

If you're confident that all problems have been fixed, you need to run through enough drive cycles so the computer can complete all required tests. Most ODBII code readers can also read the readiness of the systems. And most parts stores will read your codes for you (and system status) or let you borrow a reader.

Mar 29, 2017 | 2005 Ford Focus ZX3

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2000 Nissan Altima XE need drive cycle to pass smog test after disconnecting battery


If you take your car to smog check station and they talk about drive cycle,that means you need to drive you car on the street at speed of 25 to 35 mph then take it to the freeway and accelerate to get the speed of the rest cars and drive you car at 55 to 65 mph then take it down to the street again and drive a little more the turn it off, this is what the mechanics call drive cycle after this the car if everything is right I mean if there is no any damaged sensor the onboard computer get all the info from the sensors and is ready to the test

Sep 02, 2016 | 2000 Nissan Altima

2 Answers

2001 chevrolet tahoe secondary air system not working cant pass smog all I did was replace battery before getting it smog


Disconnecting the battery resets the PCM - engine computer ,an the emission monitors . A drive cycle has to be done to get the monitors to run an hopefully set. That's all you need to do is drive it for few days of different driving conditions - city , highway ,from cold start . google GM drive cycle . OBD Monitor Not Ready

Dec 04, 2015 | 2001 Chevrolet Tahoe

1 Answer

SMOG TEST OBD-11 NOT READY


Generally speaking, the truck has to be driven at least 100 miles in various driving conditions including highway and city driving and at full operating temp. The mechanics are correct in saying there is nothing they can do to trick the system into thinking this has happened.
If 100 miles did not do it you may have to drive 2 or 3 hundred miles then try the test.
The purpose of the computer being "ready" is having used and tested all of the emission components for problems. Once the vehicle is driven far enough for the computer to use all of the components, and no trouble codes are set, the test is passed.
Even if you normally only drive in the city you still have to log 50 or 60 miles on the highway to satisfy the requirement for the engine computer.

Oct 03, 2015 | Dodge Cars & Trucks

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What is the drive cycle for a 1998 Aurora, Battery was disconnected and need to reset sensors. Will not pass or fail smog test. Was told that i needed to do a Drive Cycle to reset the sensors?


This means you must drive the car long enough for all of the self-tests to run. Depending on the test it could be a single start and run to many cycles and many miles. Usually after about 50 miles of driving you have completed most tests.
I'm not sure where you are located, but in Ohio you can ask and have the car run on the dynamometer and compete your smog test this way.

Oct 11, 2010 | 1998 Oldsmobile Aurora

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2001 Saturn Sl1 wouldn't pass smog because computer won't reset


You will need roughly 5 drive cycles for the obd2 to allow you to pass emissions. If you have no other issues with the car I see no reason to get rid of it.

Here is a link of what constitutes a cycle.

Mar 05, 2010 | Saturn SL1 Cars & Trucks

2 Answers

My 1997 saturn SL1 wont pass a smog test..was told when I changed the battery it messed up the computer and I need to reset the computer. How do I do this?


Only service station can reset.If your check engine light is on go to a Pep Boys or auto barn most will read the computer diagnostic for free.( $ 5-10 ) tip might get them to reset it,might.I don't know what a service station charges $ 75 ? good luck

Sep 05, 2009 | 1997 Saturn SL

1 Answer

Failed smog test due to CEL - second opinion please - not sure I believe mechanic


I have a 98 Montero Sport and have yet to fail a test. I have changed a CAT Converter for 200 and some O2 sensors for 50 per since i had the car. you can get a aftermarket universal O2 sensor at a good price as for the CAT Converter ya they are expensive I just knew the guy. As for the dash light disconect your battery it will reset it

May 23, 2009 | 1999 Mitsubishi Montero Sport

1 Answer

1997 hyundai sonata wont pass smog


take negative cable off for 5 minutes and then put it back on it should reset it

Jan 24, 2009 | 1997 Hyundai Sonata

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