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I have been having the legendary P2450 issue for a while now.. Here is the story in short:
First engine light popped up and while reading the codes I got the P2450 EVAP Valve Stuck Open. Filling the gas was painful as the pump was cutting of all the time...
I was reading the forum and ´thought that the issue is related to the solenoid itself. After the new Canister Purge Solenoid and hosing was installed I was able to drive about 1000km without any issues and the code popped up again... I reset the codes and again drove about 1000km without issues and then code came again and filling up the truck got as painful as it used to be before changing the solenoid.
Any suggestions where I should try find the issue next. I live up north of Finland and the local mechanics do not have that much experience about this issue so therefore asking for asssistance.
P2450 is related to the vapor blocking valve, not the EVAP canister purge valve. Depending on the year and engine the vapor blocking valve can be in different places. On my daughter's F150 with a 2.7L it is right above the fuel tank and looks like this to replace.
The vapor blocking valve shuts off the fuel tank vent line to the EVAP canister. If this is closed while fueling it will cause the fueling nozzle to prematurely shut off. Normally the valve remains open and only closes so the EVAP system can perform its leak tests.
Better to look at the Tank Vent Solenoid for not venting the Tank.
f that does not happen, the inside air has to push back out the fill and will trigger the pump dispenser handle shut off same as liquid gas does.
It's tough to pass opposite directions on a one lane road at the rate of and volume of filling. LOL.
The Evap System has some complexity to its total operation.
Good luck.
P2450 is related to the vapor blocking valve, not the EVAP canister purge valve. Depending on the year and engine the vapor blocking valve can be in different places. On my daughter's F150 with a 2.7L it is right above the fuel tank and looks like this to replace.
The vapor blocking valve shuts off the fuel tank vent line to the EVAP canister. If this is closed while fueling it will cause the fueling nozzle to prematurely shut off. Normally the valve remains open and only closes so the EVAP system can perform its leak tests.
The part that I changed looked exactly like that and was located in top of the tank.
Vent Valve is often located on the end of the Charcoal Canister and with a hose that goes to a protected area hopefully that does not get plugged with dirt.
Canister is located above the spare tire frame area.
There are Videos on this if you do a search.
Have to drop the wheel to get at it.
Good luck.
Rockauto calls it Canister Purge Solenoid but I believe its the vapor blocking valve.
Ok, good. Yes, there are several names for this part. I think Ford sometimes refers to it as a "tube assembly".
P2450 can be a difficult DTC to track down and correct. I suggest you look at your fuel tank pressure. That can be monitored with FORScan by PCM PID FTP. If there is a problem with the fuel tank pressure sensor, but it is still within range, it won't initiate a DTC.
The FTP sensor is active at all times, even with the engine off. Check the FTP, after the truck has been off for several hours, and without starting the engine. The pressure should be close to or equal to zero. If it is any other value, use the little white auxiliary funnel to open the filler and ensure the tank is at atmospheric pressure. If the FTP is still not zero or close to it, this indicates that the FTP sensor is not reading correctly. This could be caused by a bad FTP sensor or a wiring issue. A bad FTP sensor, but still within range, can trick the PCM into thinking the problem is the blocking valve instead of the FTP sensor.
I'm assuming you have FORScan or other scan tool that can monitor a PID.
Ok, good. Yes, there are several names for this part. I think Ford sometimes refers to it as a "tube assembly".
P2450 can be a difficult DTC to track down and correct. I suggest you look at your fuel tank pressure. That can be monitored with FORScan by PCM PID FTP. If there is a problem with the fuel tank pressure sensor, but it is still within range, it won't initiate a DTC.
The FTP sensor is active at all times, even with the engine off. Check the FTP, after the truck has been off for several hours, and without starting the engine. The pressure should be close to or equal to zero. If it is any other value, use the little white auxiliary funnel to open the filler and ensure the tank is at atmospheric pressure. If the FTP is still not zero or close to it, this indicates that the FTP sensor is not reading correctly. This could be caused by a bad FTP sensor or a wiring issue. A bad FTP sensor, but still within range, can trick the PCM into thinking the problem is the blocking valve instead of the FTP sensor.
I'm assuming you have FORScan or other scan tool that can monitor a PID.
Thank you for the great answer. I have HPTuners scanning tool so I should be able to see the FTP readings.
P2450 error code in 2018 3.5 ecoboost
