Question about 2003 Ford Expedition
My service engine soon light has been on for a few months. i got an oil change two days ago (it was about 100 miles overdue) and now my truck is really really loud when i crank it. It sounds like a motorcylce. It has been slow to accelerate for some time now and sometimes it skips a little and sounds like it's putting or backfiring
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Posted on Jan 02, 2017
SOURCE: Service Engine Soon Light
no the coolant wouldn't cause the light to come on,and yes if you don't have the know how to buy and attach an obdii code reader to your truck then you will have to take it to a garage to be sure what the problem is........however the check engine light is a warning that something is experiencing a problem but correction of the problem doesn't have to be immediate, if you can't afford it or don't have the time to have it looked at right away.(keep in mind that with the light on your computer is in limp mode and you will see a drop in fuel mileage)But to get the light to go out you need to either disconnect the battery for 5-10 min or have someone check and reset the light.if you do the battery disconnect to reset it the light may not come back on for some time or may come on right away.last winter i had the light come on for an o2 sensor heater.........i reset the code and never saw it again. so if you can try the battery disconnect reset first if the light comes back on then take it to a garage.
hope this helps!
Posted on Dec 30, 2008
Ok, there are many issues here that you will need to inspect. I recommend changing the fuel filter and pump as well. this will fix the hesitation. the intake and exhaust manifold gaskets will need to be replaced as well. this will stop the backfiring.
I also recommend checking and running a teat on the PCV valve and inspect the PCV hose as well. it could have a leak or a small crack on it.
Check the air filter and change if needed. this will help with acceleration issues as well. Next, i would run a check on all plugs and the complete wire set as well. change if needed.
Inspect the injectors for leaks and lose wires. make sure they are in good condition. replace any injectors that isn't firing properly.
Ok, there are some sensors that you will need to check as well. i will list them below.
SENSOR CHECK LIST--
1. Check the O2 sensors for worn wires.
2. Check the MAFS(Mas Air Flow Sensors) Check for Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit.
3. Check the Air Cleaner Temperature Sensor. this sensor could be damaged ro have loose wires. check accordingly.
4. Check the Throttle Position Sensor. this device could be connected wrong or it may be faulty as well. replace if needed.
Be sure and inspect all the above and repair any problem spot you ruin across during your inspection.
Please rate and god bless:)
Posted on May 06, 2009
SOURCE: Service Engine Soon light reset.
The Service Engine Soon light comes only when the engine computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system, it is not related to the oil change, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
Posted on Jun 05, 2010
Testimonial: "Thanks! I guess the person that told me it was an oil change light was not quite up to speed. I'm off to AutoZone."
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