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How do i check codes when check engine light comes on or is there a reset process

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Posted on Sep 01, 2010


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How to reset check engine light 2005 dodge ram 3;7 litre

Check and make sure All fluids are Full, oil, brake, trans, etc... they all have low sensors tied to check engine indicator, then disconnect the Pos+ from the battery for one minute, then reconnect,
the engine light should then reset...

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Engine light on

find out what the codes refer to and replace them. have the cpu reset correctly and if you have covered the fault the engine light will go out. The engine light is telling you that the CPU has found sensor/s outside set parameters during the checking process

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Check engine light on with the TPS code. replaced TPS and pig tail and it checked out OK with volt meter. The light still comes back on with the TPS code

Check engine light comes on and off, these are indication that there is some error code stored in your vehicles ECM. The engine module computer needs to be scanned. These will give the code and as per the error code the further problem can be detected and confirmed. The engine light indicator blinks or remains steady on dash when engine computer noticed any problem with any engine electrically operated components.

For more help, I suggest you to refer the help links provided below. These will let you know more about which areas to look, check, when there is engine light coming up on dash panel.


Click the link below: -------



Check Engine Light Reset Procedure?
These will help.

Dec 06, 2012 | 1999 Chevrolet Astro

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When I start my car the "check engine light" stays on. Its running fine and all the fluid levels are fine.

Some fault code is stored in the PCM (computer), generally could be some emissions code, but to know excalty what faulto code is, you need scanned the PCM. Some Autozone or Autoshop with scanner reader sometimes make this job for free.

Hope helps

May 28, 2011 | 2006 Ford Taurus

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How do I reset the check engine light on 1996 lincoln mark viii after I replaced the mass air sensor. it is now running smooth and the dealer told me it was the MAF sensor. Now that I have replaced it ,...

You can take it to your local auto zone and trhe will scan and clear the codes for free. Or you can unhook the battery ground for at least 30 seconds.

Happy Motoring!


Mar 05, 2011 | 1996 Lincoln Mark VIII

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How do you turn off the check engine light

The check engine light is designed to function only when there is a engine fault. To turn this light off you will need to visit your auto parts store. Orielly's and Autozone both carry code scanners that you can barrow in the parking lot. And they may even come out and check the codes for you. Once the codes have been retrieved you have the option to reset the check engine light to turn it off. However, if the engine has a hard code or a faulty sensor the light may come back on immediately after you start the car.
I would suggest having the codes read and the MIL reset and try to determine the issue causing the MIL to come on.

Aug 03, 2010 | 1996 Volkswagen Golf

2 Answers

Check engine light comes back on after 2 seperate

Unplug the negative battery for five minutes; this will reset the ECU; if the check engine light ON again, scanning for knowed what fault codes is there.

Hope this help (remember rated and comment this).

Mar 30, 2010 | 1997 Ford Taurus

2 Answers

Check engine light keep coming on after repairs

the infomation u were given is 100% wrong! if the light is coming on then a problem exists in the OBD 2 engine control system, there will be a fault code stored for the check engine light, who told u this the dealer??

May 11, 2009 | 1999 Toyota Camry

1 Answer


The light is coming back on because the cars computer is detecting that there is still a problem after it's reset. You need to have the engine codes scanned to determine what the problem is and correct it so the light can be reset. Check your local auto parts store, most do free scans of engine codes and will give you the meaning of the codes and what to do to fix the problem. If you need further help, post the codes here and any other info regarding the problem. Good luck

Apr 09, 2009 | 1995 Ford Windstar

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