Welcome Visitor! Please take a few seconds and chetvaldes
New Member
- Joined
- Dec 15, 2012
- Messages
- 6
- Reaction score
- 0
- Points
- 1
- Vehicle Year
- 2009
- Make / Model
- Ford
- Transmission
- Automatic
Hello.
It all seem to start immediately after accidentally overfilling the fuel tank on my 2009 Ranger XL 2.3L. I'd say the next day the CEL came on. It showed P0446 when I used my scan tool. After reading on the forums what could have happened, I figured I'd saturated my charcoal canister and it wasn't venting properly. I drove it for weeks hoping it would dry itself out, but the CEL stayed on, even after clearing the code. But then it was time to get my smog test so I decided to take off the cannister and see what it looked like and see if could blow it out. Surprisingly, it wasn't clogged, and I could blow through it easily by mouth. I tested the vent solenoid while I had it off, and it seemed to seal well when energized, and stayed open when not, so that seemed ok. All of the tubes and hoses looked very good, so I put it all back together and looked carefully at the rest of the evap system and wiring- again, it all looked very good. I'm guessing the CEL comes on every time I start the engine is because that's when it does its test cycle- opening the purge valve and closing the vent solenoid and seeing if the system is holding a vacuum. I checked the filler cap, and it seemed ok when I tested it using my mouth (saw this on a youtube video). I also saw a video where a person was checking for vacuum at the purge valve during startup- when I tried this I got nothing- it didn't seem to opening. I took a chance and ordered a new one without bench testing the old one. When I put the new one on, of course it didn't change anything, same CEL with every engine startup after clearing the code. I tried running the scan tool in live data mode to look at the fuel tank pressure, and it didn't seem to change, so now I'm thinking that the fuel tank pressure sensor was somehow damaged during the overfill, even though it seems unlikely it would be that frail to be damaged so easily. I tried looking up the part online to see how expensive it is, but strangely I couldn't find it listed anywhere, as if this model doesn't use a discrete sensor, and my local auto parts store has no idea. So my questions to the knowledgeable here are:
1. Could a defective FTP sensor cause this P0446 code? Or am I barking up the wrong tree?
2. Where is the FTP sensor locate?
3. What should I do next?
4. Why did this happen after an overfill? Could it just be an unlucky coincidence?
Any suggestions or testing tips greatly appreciated!
It all seem to start immediately after accidentally overfilling the fuel tank on my 2009 Ranger XL 2.3L. I'd say the next day the CEL came on. It showed P0446 when I used my scan tool. After reading on the forums what could have happened, I figured I'd saturated my charcoal canister and it wasn't venting properly. I drove it for weeks hoping it would dry itself out, but the CEL stayed on, even after clearing the code. But then it was time to get my smog test so I decided to take off the cannister and see what it looked like and see if could blow it out. Surprisingly, it wasn't clogged, and I could blow through it easily by mouth. I tested the vent solenoid while I had it off, and it seemed to seal well when energized, and stayed open when not, so that seemed ok. All of the tubes and hoses looked very good, so I put it all back together and looked carefully at the rest of the evap system and wiring- again, it all looked very good. I'm guessing the CEL comes on every time I start the engine is because that's when it does its test cycle- opening the purge valve and closing the vent solenoid and seeing if the system is holding a vacuum. I checked the filler cap, and it seemed ok when I tested it using my mouth (saw this on a youtube video). I also saw a video where a person was checking for vacuum at the purge valve during startup- when I tried this I got nothing- it didn't seem to opening. I took a chance and ordered a new one without bench testing the old one. When I put the new one on, of course it didn't change anything, same CEL with every engine startup after clearing the code. I tried running the scan tool in live data mode to look at the fuel tank pressure, and it didn't seem to change, so now I'm thinking that the fuel tank pressure sensor was somehow damaged during the overfill, even though it seems unlikely it would be that frail to be damaged so easily. I tried looking up the part online to see how expensive it is, but strangely I couldn't find it listed anywhere, as if this model doesn't use a discrete sensor, and my local auto parts store has no idea. So my questions to the knowledgeable here are:
1. Could a defective FTP sensor cause this P0446 code? Or am I barking up the wrong tree?
2. Where is the FTP sensor locate?
3. What should I do next?
4. Why did this happen after an overfill? Could it just be an unlucky coincidence?
Any suggestions or testing tips greatly appreciated!
