note: engine was replaced at 129,666 with a donor that had 35,000 miles.
still a daily driver.
except that the CEL came on. passed smog on saturday...with a new non-porsche gas cap. then on the following tuesday the CEL comes on!
could it be the gas cap????
Yes, it is probably the gas cap. I had the same thing happen last month when I replaced the cap with a Stant gas cap and got a P0455 cel. I replaced it with an OEM cap and the cel has not come back.