Please share if the new gas cap fixed your problem?
My situation had a weird coincidence involved that makes me wonder if related...
2 weeks ago (before check engine light came on), I was at a gas station filling up. While the gas nozzle was in the car pumping gas, I absent mindedly pushed my keyfob to open the automatic left rear sliding door. It unlatched (only allowing the door to move about an inch, coming nowhere even close to contacting the gas nozzle), and then relatched and closed itself. Thank goodness that failsafe is built in.
I then drove the car about 5 miles home, and I didn't notice the check engine light on during that drive (but not to say it didn't come on right then, with a van full of children distracting me). The next day when I drove the van, I immediately noticed the check engine light.
Autozone scanned it for me, and told me P0456. I checked that the gas cap was tight, unhooked the battery to clear codes, and the next day or so the check engine light came back on.
I haven't gone back to Autozone yet, but rather did the "key to ON position and off 3 times", and this resulted in the odometer giving me the codes P1684, P0442, P0455.
Seems like quite a coincidence that my check engine light came on at or within 5 miles of attempting to open the rear sliding door with the gas nozzle in the fuel tank...?
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