What does it mean if the check engine light of a 2002 Ford Focus is still on after having the oil changed?
Go to auto zone and have the codes read for free. They will also look up the meaning of the code for you, but be careful about taking their advice on how to fix the problem. If you have an older Focus, buy a code reader on eBay for approx. $50.00 USD. (OBD-II) because you will need it a lot. The Check Engine light is always related to something in the emissions control system, e.g., a bad sensor, a leaky vacuum hose, etc. Other auto parts stores may also read the codes from the computer for free. Do not pay a mechanic just to read the code. You can try clearing the code from the computer and waiting to see if it comes back. The computer connection port is below the steering wheel, to the left, behind a little plastic cover.
Pull the codes from the computer, match the code to the troubleshooting procedure, follow the procedure to find the source. Repair the source, light will go out if that was the only problem. There are "monitors" or self tests the computer runs the car through a drive cycle, if a problem occurs, it may not run all of the self tests until that problem is taken care. Therefore, another problem may exist. It is emission related. OR hook up a scanner that is capable of clearing codes, and hope that none are still active.
On a 2004 Grand Prix would a check engine light come on if coolant needs to be changedsince it has not been changed in 127k miles?
Your check engine light will not come on because your coolant needs to be changed. The only way to be totally sure why it is on you should get it checked with a computer at a dealer or service station. The check engine light may come on if it is over heating because there is no coolant in it but not if it just has to be changed.
Why does the check engine light still come on even after you changed the O2 sensor and reset the check engine light on a 1996 Lexus ES300?
Why is the check engine light still on in a 95 Mercury Mystique after you changed the alternator and the battery?
2002 ford focus check gas light and check engine light comes on replaced gas cap lights keep coming on have checked all vac hoses and connections also replaced fuel filter also after car has run two?
Wow, My 2002 Ford focus' check engine light came on just today! I still do not know why! I checked my oil (which was changed last month) the trasmission fluid, made sure everything was tightly screwed on..... NO CLUE!!! Id say your best bet will be to do hat I am gonna do tomorrow and take it to Auto Zone or Advanced Auto and see if they will do an OBD reading on it...
What causes a 1998 mercury mystique check engine light comes on then the oil light and all of sudden the car shuts off?
I am having a problem right now with my check engine light too. I don't know why your motor shuts down, but in the book it states that when your check engine light comes on, you are having a problem with your emission control. For you, it might be a sensor is shutting down your engine. I know last month Mister Transmission was having a free check out your engine special, so you might want…
If you had your oil changed using a different type of engine oil and your air filter changed why would your check engine light come on and stay on?
You just changed the plugs in your 1991 Ford Bronco and now the check engine light is on and wasnt on before you did it How do you get it to go off?
A check engine light is usually a fail safe indicator that lets the driver know their is something wrong in the engine system. Most check engine lights can come on from something as minor as a gas cap being loose or something as major as pending engine failure. The best thing to do is to test the engine with a code reader in order to see if the vehicle should be driven.