just got the same message today on my07....

 

reset the ecu with my flashpro and "check fuel cap" message is gone.... maybe i didn't have her on tight enough....

 

Check fuel cap... Means you have a pending P1456. (code has set in one trip)
If it sets again on the second/next trip, the cel will come on and the ecu will store P1456.

Non-sealing gas cap is the usual cause.

 

I get this in my Honda Pilot when the cap isn't tight enough. When I happens, I just pull the cap off and put it back on. For some reason trying to tighten it doesn't work, but pulling it off and back on does. Perhaps it didn't make a great seal.

I assume its the same logic in the S2000 computer as my 07 Pilot.

-Mike

 

still good after ecu reset...