Do you need genuine fuel cap? ?
An engine check light is on. I have a generic fuel cap. Should I replace it with genuine Toyota fuel cap?
An engine check light is on. I have a generic fuel cap. Should I replace it with genuine Toyota fuel cap?
Anonymous
Only if you have a Toyota.
a
Just examine the existing fuel cap rubber seal for cracks.
If it's still flexible and shows no cracks, it's probably not bad and you may have a leak elsewhere.
John Alden
Odds are it is not the cap, so try the one you have on hand for now.
thebax2006
If you have a P0442 cod for a small evap leak it could be the gas cap causing the leak BUT there are other things that can also set that code. If you put a cheap after market gas cap on the vehicle and the code comes back you won't know if the cheap gas cap is sealing or not or if you have another issue. I'd buy the stock gas cap if not testing the gas cap with a Miller vacuum tester.
Anonymous
Ask the engine why the light is on first. P0455 or P0457 indicate a leak in the evaporation emissions system or a loose gas cap respectively. If that's the case, the gas cap is a good bet.