96 chevy suburb on board computer at emission test say not ready
How do i get this set is there something simple I have to do or do i have to take it to the dealer only, i need to get tags but cant pass emissions , the tech said to drive it for a week but is there any other way? and how may mile do i drive
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Re: 96 chevy suburb on board computer at emission test...
I think igot your ?,u have to put it through emissions, just before ugo put ahalf tank of the highest octane gas in a near empty tank and run it on the open hwy to get it good and warm for about a half hour, drive to test center just before u get their stop turn engine off,remove both battery cables for 1min. reinstall, go stright to test center try to do it so u do'nt have to wait in line ! some times this works! if not most states will give u tags and restrict them for 1 mo. so u can repair the problem, when u do, take certificate to ur DMVand they will give u a new sticker, call them and see if they have that waver, my state does. good luck.
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Did you recently clear the trouble codes or disconnect the battery? Once all codes are cleared, the computer will not display systems 'ready' until they go through an evaluation cycle. Some of the systems require a certain number of drive cycles before they will display 'ready'. A drive cycle is usually starting the engine from a cold start (based on coolant temperature) and driving until certain conditions are met. I don't know what the requirements are for your car, but my 2003 pickup truck requires more than 10 drive cycles before it will make the O2 sensors and evaporative emissions 'ready'. Most states only require that a certain number of systems are showing 'ready' to pass emissions certification.
For OBD 2 there are thing's the cars computer check's for emissions , there called monitors . When these monitors run an set the vehicle will be ready to pass an emission test . OBD Readiness Monitors Explained OBD Auto Doctor Scantool Garage Read this if you would like to know more . Normal driving will set the monitors in time or you could try an speed up the process with a drive cycle
code p0453 refers to evaporative emission (EVAP) pressure sensor-- high out put === causes wiring short to positive--- EVAP pressure sensor--- ECM
I would change the sensor unless you have been messing with the wires.
You have to drive the car at least 50 miles or more after you have had the computer cleared out. The computer has 3 or 5 monitors that keep track of the emission and fuel system. You may have to drive it even further but the best way to find out the problem is. is to find a shop that has a computer that can check out the system to see why it does not get ready. usually it is a o2 sensor but you need a scope that monitors each sensor.
Turn your key to the On position ( don't start it ) now, on your heat/air panel, press and hold the OFF and the WARMER (red) buttons at the same time for about 8sec. You will see your dash light up with every segment lit, you can let go when it starts. Then you computer will run its diagnostic check for error codes. Have a pen and paper ready to copy them down. As a guess, I bet it's going to throw a O2 sensor code. Let me know the codes. After that just turn your key off and your done with that portion.
When you rest your codes there is a series of tests your ECU has to go through before you can pass emissions. this is done some people can reset the code and go before its sets the code again. on the 96 you can have 2 tests not complete for it to pass. basicly you have to drive the car a couple days for the tests to pass.
check the readiness tests wait until only 2 have not passed. then you should be good.so drive and check.
what kind of car is it
some cars montier take
a while to get ready
try driving on the freeway, if it's doesn't get ready
then try driving in the city, some montier get ready
if the car is driven in the city stop and go