I have a 97 Hyundai Elantra with a 1.8 DOHC motor with 150K miles on
it. I am getting ODB2 error code P0455 and the check light is on. I
am using a carchip from davisnet.com to read the codes. I have reset
the light once but it came back on in like three days or so, about 100
miles or so. I had the car in for the gas cap recall and they replaced
the cap. I think that was like 30 or 40 K miles ago? The car appears
to run about the same as it ever has.

Should I just get another cap? What else would cause this code.

Thanks for your time/help with this.