CEL Code P0455

[jsforrest]

OK, so it's not the gas cap, I replaced that with a new OEM cap. What do I look for next?

[POS Racing]

Your profile shows you have a '90 Miata and a P0455 isn't even on the list of possible codes for that car.

If I were you I'd sell it quick!

[EricJ]

Got that on my '99. Turned out to be a vacuum hose on the bottom/front of the intake manifold, just past the throttle body had popped off. I put it back on, no more CEL. It went to the canister in the front.

[jsforrest]

Profile updated.

[cam76034]

I've got that code on my 99 right now as well. I'll be checking the vacuum lines this weekend.

[cam76034]

Got that on my '99. Turned out to be a vacuum hose on the bottom/front of the intake manifold, just past the throttle body had popped off. I put it back on, no more CEL. It went to the canister in the front.

No such luck here, all hoses are good.

[jsforrest]

No bad vacuum lines. What next, vacuum canister?