Last week the check fuel cap light came on in my 2003 F150. I double checked the cap was tight but the light still did not go off. I disconnected the battery and the light went off. Yesterday the Service engine soon light came on. (not the check fuel cap)

I bought a Haynes manual thinking it would tell me how to decode the light but apparently I need a OBDII scanner/reader.

What's the chances it's just the fuel cap? A new cap is $26 and I just spend $26 on a haynes manual. I think I might just take it to the shop.

Thanks.

 

You can just take it up to auto zone and they will scan it for free.

 

but dont just start buying parts after they run the scan. post the code number here, you might have a common problem.

 

Like the others said just run up to Autozone and they will read the codes, then post the codes here.

 

I'll have to find someone with a code reader. I'm in Canada and we don't have Autozone. I don't think any of our automotive parts shops do the free reading.

 

Check & see if one of your friends has a programmer on their Ford. I use my SCT 9100 to read the codes on all my Fords. All Superchip programmers will read codes. It will have to be a Ford model.

 

Can we presume you are NOT approaching one of the milestones that FORD designed the "SERVICE ENGINE SOON light" to remind you of?

 

There are no programmed milestones the will turn the CEL on in OBDII engine controls.