Obd not ready won't pass inspection

you must not clear codes or unhook battery after doing what they call a drive cycle which resets monitors to a ready state. http://www.lhforums.net/forums/showthread.php?2755-OBD-II-and-your-Next-State-Inspection
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Generally speaking, the not ready issue means the truck has not been driven enough since the battery was disconnected or the codes were cleared to have a new history. The cycle drive needs to include about 50-100 miles of both city and highway driving with the engine at normal operating temp. The distance does not have to be done in one trip.

Every time you reset the light or disconnect the battery it completely resets the system and it has to go through EVERY test again. The O2, EVAP, and Cat tests are generally the LAST THREE tests that are tested. You're not doing yourself any favors here.

Essentially what these readiness monitors are is the computer's notation that his has run the self diagnostics on each system and that the results feel into the expected results. If it is outside the expected results the computer will generally try to run the test multiple times before setting a DTC and turning on the Check Engine Light. It cannot set the status to "Ready" until it has a successful test within expected results; sometimes multiple successful tests. Sometimes, the tests need to run at different speeds - so the vehicle has to be driven not only at freeway speeds, but also city speeds for the tests to complete properly.

The O2 test MUST complete before the Catalyst test can run. The EVAP test generally requires that you have your fuel level at between 1/4 and 3/4 and that the vehicle sit undisturbed after being driven for a period of time for no less than 8 hours in order to run the EVAP test.

The same can be said for the O2 test sometimes because the computer needs to test the O2 sensors reaction to heating up and cooling down. Eventually they will all complete - unless there is an issue. I have seen where a component was in the process of going out and the computer was getting both GOOD and BAD results when running the tests. As a result it wouldn't set ready status because it wasn't getting the concurrent GOOD test results.

As a Texas Recognized Emissions Repair Facility - my shop sees this kind of stuff all the time.

Good Luck.

verify the oxigen sensors and catalityc converter

may have an issue with the OBD oprt power source, that is common on some saturn models. visit honestautoestimates.com for free complete information about any repair including how much it should cost.

If the readings were close to passing, use 3oz of acetone per 10 gals of fuel and it should pass. Then you have a whole year to figure out what's wrong with it! Main cat is the large one. all others are pre-cats.

if there is really no problem with all these things they should be able to clear out the lights when they go to do the inspection.

This Usually means that the Catalytic Converter is Bad and needs to be Replaced as the O2 Sensor is On the Exhaust System and the Evap is Detecting High o2 Levels. Please Rate My Response! Thanks!

fill your muffler with SOS pads just before your test a wire coat hanger can remove them after the fact..
good luck its how i got my prelude to pass inspection in vancouver bc canada

OBD Code P0158 02 Sensor Circuit High Voltage (Bank 2 Sensor 2). Hope this gives you some direction. Thanks for Using FixYa!

Sincerely,

JC