Question about 1997 Ford Thunderbird LX

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Service Engine Soon light reset.

How do I reset the "service engine soon" light after oil change?

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  • Ford Master
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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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Posted on Jan 02, 2017

chiquititas
  • 1010 Answers

SOURCE: service engine soon light

Check and make sure your gas cap is on properly first.
Have you noticed any differences in the way your car is
running? Most of the check engine light complaints from
our customers at the dealership turns out to be an improperly
installed gas cap. You might have to take a number of
trips to and from the store before you check engine light will
go off, if it was the gas cap or you can have a service dept.
turn it off for you.

Posted on Jun 26, 2008

eitan
  • 291 Answers

SOURCE: reset service engine soon light

try unhooking the battery for a couple of minutes

Posted on May 15, 2008

  • 90 Answers

SOURCE: 'service engine soon' light

HI
without using the scan tool you can do it by disconnected the the battery for ( 24 h) to reset it or to ( 5 m) to reset the service engine light but the fault sty in the memory

WITH MY BEST WISHES

Posted on Jul 10, 2008

  • 1 Answer

SOURCE: Service Engine Soon light on 2002 BMW X5

go back & sleep with the mechanic, that always works for my sister.

Posted on Jan 02, 2009

techbuster
  • 5081 Answers

SOURCE: service engine soon light come on

There are TONS of reasons - the first , and least expensive, step is to read the codes that the onboard computer is throwing. Instead of spending a lot of money on a code reader, or wasting money by going to the dealership, find an AUTOZONE (or, sometimes MERCHANT's will offer a "we'll check your CHECK ENGINE LIGHT for free) and they'll give you a generic read of the code(s).
I say "generic" because the computer DOES throw specific codes; the "we'll do it free" places usually don't have the same kinds of super-readers that the dealerships or high-end repair shops own. But, bear with me for a sec....this may save you some money.
If the generic code says, "O2 sensor"....that's not as specific as you'd like (because there are multiple 02 sensors!)...BUT....if ONE sensor is not functioning properly, its a pretty good bet that the other(s) will be failing soon too, since they were all installed at the same time and all were made by the same company, etc.
The "generic" code WILL tell you enough info as to which sensor is bad (the one in front of the converter vs the one behind the converter) so....if THAT is the code, then simply replace both behind or both "in front". Follow?
Now, where you'll typically get the most common code is for low fuel pressure. If you've never changed your fuel filter...that's a good place to start. The "generic" code will indicate "fuel pressure". If you've never changed the filter....see? BUT, a fuel pressure problem could also be as simple as "loose gas cap"! If your generic code says "fuel pressure", then I'd reset the computer (disconnect the battery for a few minutes and re-connect), and while the battery is disconnected, make sure that the gas cap is tight and the little rubber gasket around the cap is in tact.
Keep in mind....a "check engine light" doesn't mean that your computer is throwing codes CONSTANTLY! It means that the computer sensed something at some point while the scan was running and SOMETHING got its attention. "IF" the fuel cap was loose, for example, just re-tightening it will not reset the "check engine light"! You gotta reset the computer (disconnecting the battery is easiest), THEN the light will be off. If the light returns, then the problem was something other than the gas cap.
Taking your time and doing a little on-line research can save you a ton of money! A 2000 is relatively easy to work on yourself...at least SOME of the issues...even if you're not a really techie-kinda person. Take the easy and inexpensive shots first....
Hope this helps.

Posted on Oct 12, 2009

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