Question about 2008 Saturn VUE
2008 failed state inspection due to evap problem gas cap replaced twice and engine light was off during second inspectiona and still did not pass.
Posted by Anonymous on
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Posted on Jan 02, 2017
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.
Posted on Mar 27, 2009
the scan tool that you are using will not read codes from all of the modules. take the car to a gm dealer to have it checked with a tech2
Posted on Apr 08, 2009
Too, make sure to repost what code it is before buying anything.
Posted on May 12, 2010
Testimonial: "Thanks for the help it was the gas cap which was one of the codes from the print out yesterday at Auto Zone."
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