Question about 2002 Mercury Mountaineer
My check engine light came on, bought a new gas cap. Turn off the light and it comes back on once the gas gets to around a 1/4 tank of gas??
Posted by Anonymous on
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Posted on Jan 02, 2017
make sure that the gas cap have a rubber gasket in it if it has accidentaly dropped off while you removed to fill the tnk it will not seal properly and create a vacum leak causing the ecm to turn on the light.
or did you have an accident or did you run over any thing that could have damaged the vapor canister at the bottom of the vehicle and if this is the case you will see the light on because a damaged canister can cause a vacum leak
Posted on Nov 11, 2008
SOURCE: abs light comes on
U WILL NEED TO HAVE THE DEALER RUN AN ABS TROUBLE CODE RETRIVAL TEST, THEN THAT WILL GIVE U THE CIRCUIT OR SENSOR TO CHECK FOR THE FAULT THAT IS TURNING THE LIGHT ON.
Posted on Feb 11, 2009
Go to the local parts store, have them check the codes (they will do this for free usually). It will tell you what sensor needs to be checked/replaced. Once the part is replaced, it will clear on its own. They can also reset the code, but it will come back if the trouble persists.
Posted on May 27, 2009
On a Car like that you have little sensors on each one of the wheels. These sensors are small, delicate and finicky. You probably have a loose one or when the wheel heats up or reaches a certain speed, highway driving, it loses the connection and the light comes on.
The best way to fix this is go to a shop. Since the answer lies in the computer somewhere they need to check it. Note that the computer on your car stores the data when this happens and they should download the stored data if everything " seems fine ". Hope that helps
Posted on Jun 11, 2009
The most likely failure that will cause your problem is the fuel level sender in the gas tank. The sender will cause both the fuel gauge problem and the check engine light to be turned on. The sender will need to be replaced to repair the problem.
Posted on Jun 28, 2009
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