So this is what I am left with. Fuel gauge stopped reading properly. Seems like it's the motor since it still sort of reads accurately but the needle is just way off. Or is it both motor and sensor? Ran seafoam through the tank a few weeks ago for the first time, could that be it?

Change oil light came on prematurely and for the first time ever (just changed oil 2 weeks ago and the oil level is fine), and simultaneously with P0455 - mass leak/no flow. No idea what that means as I've never had that before. I'm not leaking anything under the car and it feels and sounds and runs just liike normal. Occasionally P0440 comes on when I haven't screwed the gas cap on but this is not it.

All of these happened at once, what do they all mean?

 

P0455 indicates a fuel vapor leak or insufficient purging of the EVAP system. It can be caused by a loose/defective gas cap or a crack/hole in any of the hoses in the EVAP system. Since you are also getting P0440 code though, it's possible that the purge solenoid has malfunctioned or the charcoal canister is clogged. As far as the fuel gauge goes...I suppose it is possible that the fluctuating pressure in the tank could cause the sending unit float to act erratically, but since all of these problems popped up simultaneously I would wonder if there's a loose/dirty electrical connection somewhere?

 

Would any of them perhaps be caused by one another? Not sure if it's an actual leak, I remember when I had P0440 I went around trying to find a leak everywhere else first but no dice. What's the most likely culprit of 0455 specifically? It read on mine as mass leak/no flow. Different from what it said for 0440. It seems like they might be different?

Any ideas on the change oil light? Cause I definitely don't need to do so lol.

 

Our cars are weird with how they calculate the change oil now. If you pull the dipstick and physically check the oil (rub it in your fingers, I don't care how recent it was done) then you can just reset the light through the radio.

 

Thanks guys.

So I probably don't have big problems looking, is what yall are saying?

And how to reset oil with aftermarket radio?

 

Turn the key to ON without starting the car, within 5 seconds press the gas pedal all the way to the floor and back up completely 3 times.

 

Thanks Chibi

 

Any info on 0455 vs. 0440? My main concern right now. Don't think it's the gas cap cause that causes 0440... doesn't appear that I have any vacuum leak..

 

It's a generic code, that any part of the system probably has a leak.

 

ugh. any common areas in specific on these cars? Certain hoses, etc? Somewhere to start..