02 Boxster 160,000 miles, original clutch and Idler shaft bearing!! Replaced cap, CEL stayed on, replaced cap-activated valve at top of filler tube on outside, left reed switch out, no light but couldn't fill fuel, put reed switch back in place verified audible click when filler port gate is opened with finger, but CEL is back p0455, is canister purge valve the culprit? conflicting locations one is on the engine below intake manifold, one is on top of canister, which is it?
