Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Hi! Welcome to JustAnswer. Thanks for coming! I'm Ron and I'll be working with you on your question today.
Do you happen to have access to a scan-tool that can interact with EVAP system components?
Ok. More commonly with the P0446 is a faulty EVAP Vent Solenoid or Fuel Tank Pressure Sensor. Unfortunately, the test to determine which is faulty requires a scan-tool. In my experience though, P0446 is more commonly the Vent Solenoid. So, this may be the better place to start. The Vent Solenoid is located on the driver's side frame rail. Inspect the electrical connector and wire harness for any loose, broken or damaged wires. Inspect the lines for any cracks, holes or disconnections. If the inspection checks ok, I'd recommend replacing the Vent Solenoid. For an image location view, click here: https://goo.gl/wV9xdQ
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Ok. Above you stated the EVAP Canister. Did you replace both?
Ok. Then the Fuel Tank Pressure Sensor is the next item that can set this code. It's located at the top of the fuel tank, mounted to the top of the fuel pump assembly.
Unfortunately, I do not. It has a 3-wire connector going to it; black, dark green and grey. To gain access, the fuel tank will need to be lowered.
You can't miss it. It's mounted to the top of the fuel pump assembly. I can give you a picture of the sensor here: https://goo.gl/j52lVu
My apologies. View the image here: https://goo.gl/vRXeFn
Did the image display for you that time?
Hi! I noticed this thread was still open, so I wanted to check in and see if there was anything else I could do for you on this issue? Any other questions you had? Was there something you wanted addressed that I may have missed in my answer? Did you find my answer helpful?