My car runs EXCELLENT w 149,000mi...but, it won't pass smog. My good friend said that the a smog shop can put in that cars codes in the computer of the car and it should make the computer send smog diagnostic because according to another smog tech that the battery must have been disconnected and erased all the info. He said put miles on it, about 200+mi, and it still didn't pass. What can i do to make the computer send smog info so i can pass smog?? Thanks
Just because the car seems to run well, does not mean the emissions are within spec. For example, you could be running a little rich and the car will start and run great, but the exhaust is not within code.
What you can do is take it to a "smog shop", that is a repair shop with the proper equipment to diagnose the problem. If the testing is simply the reading of the on board computer codes, then most any place can read those, but you need an experinced mech to know what to do about it. May need an exhaust gas analyzer to physically sample and analyse the gasses. For the actual test, as long as the computer says all is fine, usually, you're good to go.
If the computer looses power any saved run data will be lost and must be re-accumulated to pass the smog test. A few hours to a day is usually enough run time to accumulate enough data.
SOURCE: egr valve on a 99 saturn sl
Take it off and look at it internally, See if you can move the diaphragm if not then it needs replacement. But you should just go ahead and replace it anyways since it is a 99 it would just be worth it
SOURCE: 2000 Saturn SL2 fails smog due to failure of OBD Self test
Some vehicles require very specific drive cycles (called "drive traces"
if you perform them on a road simulator or dyno) to activate certain
self-checks like the catalyst and EVAP monitors.
As a general rule, doing some stop-and-go driving around town at speeds
up to about 30 mph followed by five to seven minutes of steady 55 mph
highway speed driving will usually set most or all of the monitors.
Consequently, if you're checking an OBD II system and discover that one
or more of the monitors have not run, it may be necessary to test drive
the vehicle to set the remaining monitors.
You should talk to a good emission tec, if this is not throwing a code, it is hard to say if that one of the components could be bad. O2,pump,convert, HeO2, every part of the emission system.
With a 1000 miles, and doing what is says above just before the test, and ending driving at the test
should be plenty. If it is not, you will have to have each emission part checked, or when the computer
is plugged in it might show a code that did not trip dash light.
SOURCE: PCM code P0404
P0404 - Exhaust Gas Recirculation (EGR) Open Position Performance
I suspect the EGR got stuck closed, u will need to put around 30 miles on the car before the light will return if the problem is still present..
SOURCE: 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.
Testimonial: "Thanks for the quick response!"
SOURCE: my car runs great but
its the evap canister solenoid, fairly easy to diagnose and fix, common on fords-here is a link with description of problem and correction:
;
http://www.obd-codes.com/trouble_codes/ford/p1451.php
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