Why CEL after putting in gas?? All the time?
 

This is the 3rd time I filled up my tank all the way and my CEL came on. 2 times at Hess and another time at BP. All 93 octane.

Code 13 = rpm signal or knock, everythign tells me something different.


but why? how can I fix this?

im goign to change my fuel filter, but what else can it be?

Sounds like you aren't putting your cap on tight enough.

Or (lower probability) do you leave your car running while you fill up?

:agree:

Faulty gas cap (bad seal). Fairly common and an easy fix.

yep, had that on my old car too.

that will throw a CEL?

i shut off the car to fill.

the seal "looks" fine

it doesnt hiss while the car is on or anything

I thought that knock sensor errors were code 53. My manual says that code 13 is as follows:

so what does that mean? LoL

isnt the codes different for obd 1 and 2 what year is ur car?

obd1 1992

thanks

most likely the gas cap seal. I've seen it happen before, but im not sure if it should throw out a code 13 though.

well i replaced my fuel filter... seems to gotten rid of the code almost 100%

my sc has this same problem and i changed my gas cap thinking the same thing

when was your fuel filter done?