127k on the engine. CE light came on a while ago, pulled the code P0445, was told I needed a new gas cap. Replaced that, light was still on for a few months so I took it to the shop and they smoked it and said i need new evap canister. Disconnected my battery to do some maintenance and the light stayed off for about 2 months. Just popped back on so I had it read at Autozone. Showing same code. Anyone run into this before? Was it actually evaporator cannister? Looking to get a used one and replace myself.
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I had this issue on a Ford Ranger and it drove me nuts. P0445 indicates a failure in the evap system, which manages fuel vapor. The thing is, the entire evap system is usually only a few parts which are the fuel cap, evap canister, and a valve or two.
Best thing to do is test each component including the circuit feeding the purge valve until you find a failure.
My Ranger purge valve failed testing so I bought a new one. The new unit behaved the same as the broken one so I double checked all my tests. Ultimately I came to the same conclusion that the purge valve was bad which didn’t make sense. I dropped the truck off at a shop I had used in the past and they told me only they couldn’t figure it out either. At least it wasn’t just me I guess…
Eventually I purchased a second new purge valve and it worked correctly. New parts are not always good parts. Diagnostics, when dune correctly, is a science.