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Try resetting the check engine light by disconnecting the battery for a few minutes (While the battery is disconnected turn your key on and off a few times and run through some switches on the dashboard to drain out any remaining power that might still be in the system). If your vehicle is equipped with a backup power source for memory purposes it could take a bit longer. Reconnect your battery and everything should be reset as far as warning lights. If the check engine light comes back on i would say you have an unrelated issue.
There are three ways to reset a check engine light.
1. Disconnect the battery, wait approximately 30 minutes, reconnect the
battery. This resets the cars computer which also reset the check engine
light. On newer OBD (on-board diagnostic) compliant vehicles this
usually does not work. See step 2.
2. Reset using an OBD II reader. When you hook an OBD II code reader up
to your vehicle, you can reset the computer using the code reader.
3. Fixing the problem. Generally the check engine light comes on for a
reason. Usually it is emission related (sensors, gas cap) or electrical
(faulty wiring). In this case the way to reset the check engine light is
to fix the problem
In most later vehicles, that light may stay on for a fixed number (it can be 5-50, we have both) of startups of the engine or many have to be manually reset.
The engine can't tell the computer that it has fresh oil but will turn the light on after some finite mileage since the last reset for periodic maintenance items such as your oil change, but some items can't reasonably reset the computer; it has to be told that the oil was changed.
Check your manual to find how to reset that warning light and if you no longer have the manual for your vehicle, you can download a copy of it from the Ford website.
you can use the scanner to clear the computer or even disconnect the battery for a minute or two then reconnect it but if the light comes back it needs to be fixed to keep the light off. just fixing the problem won't turn the light off
there are two ways to turn the check engine light off one is to disconect the battery for a couple of minutes the other one is to take your truck to any autopart store that can read your check engine codes and ask them to reset the light they will usually do it for free.
I purchased a hand held Code Reader at WalMart for around $100.00. The reason your Check Engine light is coming on is that you need to "Check your Engine!" If you have a service manual it will tell you what the codes mean. I had Check Engine Light on for months because I had a high idle speed of over 2,000 RPM. I kept digging on the Saturn Forum website because I could figure out what was causing the high idle. Finally after about 6 months of the annoying Check Engine Light coming on I finally figured out that I had a blown intake manifold gasket. I changed the damn thing and now the light stays off! Imagine that! The Code Reader will also reset you engine so the "Check Engine Light doesn't come back on until the computer senses that there is still a problem.