Postby goinkster » Sat Oct 28, 2017 7:27 am
OK, well I thought I would let everyone know what I have done.
Code P0448 came back the day after my last post so I tore everything apart back there again.
I used compressed air and blew through every line and the canister again.
Not much dust this time, a little but not much.
I also disconnected the battery and cleaned the terminals.
The battery is 16 months old. There was no corrosion on the terminals.
I cleaned the battery posts and the lugs.
Typically I would not because they looked clean, the lugs were tight.
The only reason I did this was because I was out of ideas.
After doing this I have not had a code. Again I was getting this code at least once each tank.
Took a trip east, 1100 miles and 4 tanks of gas no codes.
I have put on 1000 more miles 4 tanks 5 weeks since and still no codes.
I don’t know for sure but I think cleaning the battery posts may have done the trick.
If not cleaning the posts then maybe it was just disconnecting the battery.
I am not sure if this will help anyone else but it may be worth a shot.
If your getting a P0448 code. If changing the VC valve and blowing out the lines and the canister does not fix it, try disconnecting and cleaning the battery posts and terminal lugs.
Or just clean the battery first before you waste money on a VC Valve like I did.
Good luck.