The Service Engine Soon light has come on on my 2000 F-150 with a 4.6L when I was driving home in the rain. It has about 120,000 miles on it now. What are some of the main reasons why this comes on? Oxygen Sensors?
Thanks

 

Take your truck over to an Autozone or an auto-parts shop and have them pull the codes. Come back here and post them, we'll try to help from there. Otherwise we're just pulling straws without much help.

 

Like Kijutsu said, you will run yourself crazy trying to think of why. Advance Auto or Autozone will read the code for you free and tell you where you need to look. The first time my CEL came on in my truck was at 165,000 miles and the code read that there was improper pressure in the fuel tank which was the gas cap. Quite a few things can trigger this light, when you get the codes post again and we will help you figure out what to change and what not. How does the truck run?

 

Just pray it aint the dreadfull (P0401).....good luck bro

 

I will go to Advance Auto and get a code, but it isn't the Check Engine Light (CEL) that came on, it was the Service Engine Soon light. I don't know if there is a difference, but it is still running the same as it did before.

 

There is no differance from what I know....the later models display (service engine soon) and the slightly older models show (check engine).....I could be wrong but it is the same thing I believe. Good luck..keep us posted.

 

Service Engine Soon (SES) and Check Engine Light (CEL) are just other common names for the technical name, Malfunction Indicator Lamp (MIL).

As it happens, a P0401 is one of the easiest codes to fix, if you can follow directions.....

Steve

 

I hate to bust your bubble Steve and I mean no offense...but (P0401) has been a major yeast infection in my 97 F150.....read my post and many others and you will see that P0401 is a major ****ing pain with some of us Ford owners!

 

I went to Advance Auto and they ran it through a computer and it gave the code: P0442. The guy who worked there sayed that it may be that I need a new gas cap. Air is leaking by. Is that what the code: P0442 means? or is it something else.
Thanks

 

Remove gas cap, replace gas cap insuring it's on correctly, take back to autozone have them erase the code, and let us know if it comes back on.

 

I bought a new fuel cap because I was told that could be the problem and more than likely is. If that is the problem, then how long will it take for the light to turn off?
Kijustu (above reply) sayed that you can erase the code at Autozone. After solving the problem, do I have to get the code erased to make the light go off?

 

If you'll note, I specifically said "if you can follow directions".


To clear the light, just pull the PCM KAM fuse in the mini-fusebox under the hood for 10-15 minutes. If you do this instead of unhooking your battery, you won't have to reset your radio buttons. Hopefully, you weren't planning on an emissions test in the immediate future....

A P0442 code is caused when there is a small airleak into the evaporative emissions systems. Common faults are a leaking gas cap's airseal, CV solenoid, or a leaking hose/fitting anywhere in the system including the VMV valve, the charcoal canister, the fuel tank, or any of the misc fittings. If the replacement of the gas cap does not cure the fault, your best bet is to take it to a shop that has a smoke machine and a skilled technician.

Steve

 

culd these same thing be true for f550 that runs great but after a mile the ses light comes back on everytime I drive it?

 

Please do NOT resurrect old dead threads without good reason and explanation, especially for an unrelated issue.

Get your fault code(s) and punch them into the SEARCH tool. Read previous threads and study what is happening and what the possible courses of action might be. Then, ask questions to clarify and to pinpoint.

If making a new thread, provide information that is actually useful and that doesn't leave the reader wondering "WT_ is he talking about?"

 

Hi

I have an 03 F150 XL 2wd 4.2 5 speed with 180K miles and the following codes". It just came back from the electrician who fixed an accessory circuit short in the harness that goes over the steering wheel shaft behind the dash.

Can you tell me where to start? Thank you guys so much!

P0135
Po141
P0155
Po161
P0340
P0443
P1131
P1151
P1152
P1409
P1451