CEL when runing low on gas

[Mike]

I notice if i drive untill my low level light comes on i get a CEL. After i
fill back up it will go out after about 100 miles. I havent gone to have the
code read, but any ideas why it would do this ? Something in my tank ? This
is a 03 WRX

 

[Todd H.]

I notice if i drive untill my low level light comes on i get a CEL. After i
fill back up it will go out after about 100 miles. I havent gone to have the
code read, but any ideas why it would do this ? Something in my tank ? This
is a 03 WRX

I'd bet a quarter on a gas cap that perhaps is not sealing as well as
it used to. Less gas = less vapor pressure = evaporative sensor in
the gas tank reads too low a pressure and kicks the evap code out.

Go have the code read at autozone or the dealer, and post back what
you find out. If the code is evap, it's just a new gas cap you
need.

Best Regards,

 

[Mike]

I will go do that. Will the code still be stored even though the light is
out ?

 

[Todd H.]

I will go do that. Will the code still be stored even though the light is
out ?

Yeah.