Engine light

"Service engine light soon" came on a couple days ago. Dropped by advance auto. Turns out it was a gas cap code. I hadn't touched that thing for about two weeks. Anyway good to know. Got new wipers in the process.
 

calvcopf

Well-Known Member
"Service engine light soon" came on a couple days ago. Dropped by advance auto. Turns out it was a gas cap code. I hadn't touched that thing for about two weeks. Anyway good to know. Got new wipers in the process.

Just put a new $10 gas cap on it and clear the code. If it comes back on then take it to a repair shop for diagnostics.
 

homedepot20

Well-Known Member
I had same issue several weeks back and replaced gas cap TWICE to find out a emission hose had been displaced during gasket replacement . Repair shop was HONEST & said their error, so no charge on diagnosis testing both times
 

Dakota

~~~~~~~
Just put a new $10 gas cap on it and clear the code. If it comes back on then take it to a repair shop for diagnostics.

:lol: If it was anything like my old Kia, all I did was fill the tank, screw the cap back on and it cleared itself. Mine would code like that if the cap wasn't screwed on tight enough.
 

Crewdawg141

IYAMYAS!!!!!
"Service engine light soon" came on a couple days ago. Dropped by advance auto. Turns out it was a gas cap code. I hadn't touched that thing for about two weeks. Anyway good to know. Got new wipers in the process.

Just to add a little bit of my personal experience with such a code, if changing the cap does not solve the problem there are emissions hoses on top of the tank in the same area where the fuel lines enter/exit the tank. I had the code and it ended up being a small hose that dry rotted to the point of leaking. Might be worth looking at if your problems persist.
 
I had same issue several weeks back and replaced gas cap TWICE to find out a emission hose had been displaced during gasket replacement . Repair shop was HONEST & said their error, so no charge on diagnosis testing both times

I suspect this may be my case. That is the side of the truck that got hit by the deer and they replaced the panel and had to drop the filler tube. I'll bet that hose came off. I also bet I can't reach it. Will try later.
 

Im_Me

Active Member
I had this light come on about 2 years ago when one of the kids left the cap off after a fill up. It didn't clear for several days after I put the cap back on. I bought a new cap, but the error finally decided to clear before I got it on. Hasn't been a problem since. I still have the new plug somewhere....:shrug:
 
Ok, my hose goes up and stops just short of top of the filler tube. It seems to have a cap or valve on the end. No way the hose is dry rotted, no cracks and flexes ok. I'll try a new cap next.

Maybe you had a midnight visitor who didn't lock the cap back down? And there's really nothing wrong except maybe a gallon or two missing?
 

Ken King

A little rusty but not crusty
PREMO Member
What kind of truck do you have? I can't remember anything but your bike.

When you located the cap end of the tube did you trace it all the way back to its origin?
 

NextJen

Raisin cane
"Service engine light soon" came on a couple days ago. Dropped by advance auto. Turns out it was a gas cap code. I hadn't touched that thing for about two weeks. Anyway good to know. Got new wipers in the process.

I just noticed it was your b-day, desertrat.
:bday:
 
I had this light come on about 2 years ago when one of the kids left the cap off after a fill up. It didn't clear for several days after I put the cap back on. I bought a new cap, but the error finally decided to clear before I got it on. Hasn't been a problem since. I still have the new plug somewhere....:shrug:

I thought that is what mine might have been. I have a locking cap and didn't turn it enough to lock it last time (two weeks ago) and though it may have worked loose. Well I was hoping anyway.

What kind of truck do you have? I can't remember anything but your bike.

When you located the cap end of the tube did you trace it all the way back to its origin?

Hell no. :lol:

I just noticed it was your b-day, desertrat.
:bday:

:howdy:
 

glhs837

Power with Control
A quick note on evap codes. Like a lot of codes, they do have a natural reset process. Meaning that if you fix the condition, the system will see that, but wont erase the code right away, it will require a certain number of "drive cycles", which means a full warn up to operating temp, a shut down period of a certain amount of hours to let the car go full cold, rinse and repeat.

On the Neon, I think it was 8-10 cycles before it would reset.
 
A quick note on evap codes. Like a lot of codes, they do have a natural reset process. Meaning that if you fix the condition, the system will see that, but wont erase the code right away, it will require a certain number of "drive cycles", which means a full warn up to operating temp, a shut down period of a certain amount of hours to let the car go full cold, rinse and repeat.

On the Neon, I think it was 8-10 cycles before it would reset.

Thanks. I have not driven much since I tightened cap and disconnected battery.
 
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