My P0456 code came on this morning, and I was wondering ways I could troubleshoot this. Also, what things can an evap leak cause? Is it still safe or healthy for my engine to drive with this code on?
Finding those leaks can be a bear. All the best!I’ve been getting a p0456 code. I changed the gas cap, then I checked the lines all the way back to the tank and they looked good. They code came back. I then took it to a shop where they smoke tested it, they told me it looked like the charcoal canister. So then I changed the charcoal canister, and while I was in there I just changed the leak detection pump in the passenger side rear fender well. I also checked all of those hose connections and they looked good. It came back about 4 days later. I then changed the purge valve under the hood, thinking that would be the last thing I would have to do without dropping the tank. Well, it came back on a week later. I just bought a new fuel tank gasket and fuel pump nut. I’m thinking this will be the last thing it could possibly be. I’ll update this once I drop the tank and find out. I might just buy the smoke machine at this point.
I got this one for $122 total about 4 months ago. Worth every penny. This thing really pumps out the smoke, has its own regulated air pump, and made finding the vacuum leak very easy. The price seems to have gone up with this particular seller but when I found this one for $114 (before taxes) a lot of other sellers were asking about $145...so look around.I've got the same code. I've been driving it awhile anyway. I haven't had the time to do a smoke test and I don't have a smoke machine. I tried to find a place to rent one but was unsuccessful. I was also going to start with replacing the gas cap.