Guys i need a lil help ...i have Engine Check Soon light on...i ran diagnostic and no code errors came up...checked all the coomon problems it could have and everything is fine .... car drives good ...but i cant figure out why the light is on....any suggestions ???

If the CEL lights up, there HAS to be a code stored in the computer. I mean, that's basically why that light is there. To tell you that there is something the computer don't like.

I can't remember if the 03 and up FORDs are OBDII or CAN. Which is it?

well i know this is gonna sound stupid but it could be your gas cap. It happens to my dads 05 F150 all the time. He doesnt tighten it enough so the light goes on. Also he overfilled his tank once and that also set it off.

I'm pretty sure 03 is still OBD2 but I could be wrong. That would explain the lack of a code for a CEL.

The gas cap would come up as a code. Is your computer OK?

problem solved ...it was DPFE sensor...when i drove home from work i noticed that it was eating gas more then usual and i noticed that each time i steped on the gas i could hear the gas flow..so i went straight to the dealer and got the sensor..to see if it was it .also got new EGR...just incase ..so yah problem solved..got to return EGR tomorrow. still wondering why computer didnt pick it up ...weird.

it took like 6hours of driving on my car for the CEL to come up after some misfires....dumbass car

It has to misfire 10 times consecutively to trigger a CEL in most OBDII cars.


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I disagree. I pull CEL's weekly and only half have actually codes attached. This is not uncommon for many cars.

Just remove the battery (+) side and hold the brake down for 30 seconds. this will drain the ECU and reset the CEL.

__________________
:bd: -Randy

Political/news Forums clicky here!!

Randy, do you understand the function of the Check engine light in todays' cars?

The computer illuminates the Check engine Light when it doesn't like something, and it wants to bring it to your attention.

For some codes, the computer doesn't even light the CEL because they may not be important.

Just because you don't see codes with your generic scanner, it doesn't mean there are no codes. I'll give you a perfect example. FORD has a "Speed Limiter Reached" code. It doesn't light the CEL, and you will not read it with a generic scanner. The only way you can see that code is with a FORD/Dealer scan tool, like say, my NGS tester, which is a scanner that will talk to ALL modules in a FORD automobile.

Ofcourse, with yours being a Subaru and all, I don't know. Subaru might have a few lines of code to randomnly light the CEL so the beatniks driving them will take them to their dealers and get charged a "diagnostic fee".

You go ahead and keep resetting your computer after "blank" CELs. Let me know when your engine blows up after some part failed (with lots of warning from the computer) so that I may point and lol at you. :p

+1.

generic OBD scan tools wont catch manufaturer specific codes. I pull codes DAILY with my Snap-off MODIS scan tool at work and you will indeed get codes that wont ever show up on generic scan tools. MODIS is manufacturer specific, and I have the software installed for all domestic and most asian vehicles.

theres also an inverse effect that happens alot on 1st gen OBD Nissan cars where no codes will come up through manufactuer specific but they will come up in OBD.

and like DO said, there are codes that wont command the MIL. thse codes are what we call 'non emissions' codes. these codes command the MIL because they are usually just notification codes of a minor or insignifcant problem, or simply just a note, like speed limiter reached, the codes that do command the MIL are codes that are of some importance, and we call them 'emissions codes' because in Illinois and a few other states, emissions testing is only pulling codes that command the MIL.

OBD is very tricky and quite honestly a very sloppy communication system. nothing is consistent with each make and is a big hassle. i stsill undoubtedly better than OBD I tho.

that Exoloder is not a CAN vehicle. CAN is being used on the 05+ Mustang, 04+ F-150, '07 Fusion and a couple other vehicles.

i havent played with CAN much, but its definetley much more advanced than lousy OBD

Add the 03+ Powerstrokes to the CAN protocol.

whats a NGS tester ???

One of these:

You know you just killed my bandwidth limit?

Yeh. report me to the mods. :p

can you actually see your picture fullscreen ?

Holy Ginormous pic Batman!


Geebus! I can see the bacteria on the door handle. LOL

[quote=Digital Oxygen;37422]One of these:



its better for ford then OBD II ??? btw this weekend i had door ajar go off ...so i replaced actuator and it didnt solve problem then i took lock off and there was this lil sensor that i unpluged and pulled it out from the lock..looked like pin with a button at the end...aperantly it got stuck inside ..so put on some WD40 and problem was solved ...grrrrr...spent 2 hours on this crap...

Huh?

IT IS an OBD II Scanner. Only it talks to EVERY module on a ford, unlike a generic scanner that only talks to the engine computer, and even then, it doesn't pull all the codes.

Actually, my NGS Tester will pull OBDII and CAN (with the separate module).

Will an SCT Xcal2 pull those codes?