I can't get a car smog for my 1996 Ford Explorer because the check engine light won't shut off.?

Answer 1

You should know that the second generation of computer controls (OBD II) runs tests on the components as did the first generation, but in addition to those there are some significant additions.
1) If the computer runs a self test and finds a failure that will cause an increase in emissions, it will illuminate the MIL (check engine light).
2) In addition to electronic components, OBD II also runs monitors for systems that are not necessarily computer components (eg. catalytic converter, EGR valve and system, EVAP system etc)
These items must be tested under prescribed circumstances, and the computer will keep track of tests run and not run, and those which fail.
When you clear the codes, and turn off the MIL, you must drive the car in a certain manner for a certain distance for some of the monitors to run. If you should try to perform an emissions test while these monitors have not been set, you will still fail the test, even if the light is out.
It is important then to find the fault (not just the faulty component) repair it, and road test it and then run the OBD II drive cycle to set the necessary monitors.
For more information try this site----->
http://www.obdii.com/

Good Luck

Answer 2

On a 1996 or newer vehicle equipped with OBDII, the Malfunction Indicator Light comes on when the emissions of the vehicle are at 1.5 times the normal amount. Emissions can come from places other than a bad wire or sensor. Such as a gas cap that is missing or not tight causing evaporative emissions. A slipping transmission that causes you to use more gas to go the same distance will cause it. Without knowing the exact cause of the light, you could waste a lot of money trying to fix a problem.
A recent study shows that the number 1 factor in getting a repair of this sort diagnosed and corrected on the first try is that the mechanic has 15 years experience in these types of repairs.
Your best bet is to find a mechanic with a good amount of experience who does smog checks.

Answer 3

Ask your local aftermarket parts stores if they can read and clear trouble codes. The light is indicating a fault condition in one of the truck's many computer sensors...finding out what it is may save you a ton of repair $$$ down the road.

And remember, a fault code doesn't always mean that particular sensor needs replacing...it just indicates a fault in the return voltage for that circuit. Sometimes the problem is as simple as a slightly pulled-out wiring harness.

Answer 4

it could precise be endless element. to contain short contained interior the electrical powered powered gadget. Or the engiine save sensor decrease the engine off to reserve it and to low of oil presure. Or the alternator isn't putting out anought potential with eletric products activate.

Answer 5

it is most likely a sensor defect , usually the air temp sensor for the fuel system. If you have taking care of the plugs, pvc and oil , than thats it !!!

Answer 6

that is a correct statement.