grifter77 - Why are you now interested the "Fuel Injector Pressure Sensor" ? Your initial issue (P1450) is Evap system related NOT fuel supply to the engine (no matter which engine you have).

 

post #14 thought it was worth a try

 

grifter77 52merc is correct in post #14, HOWEVER he says "Did you change the FTP (Fuel Tank Pressure) sensor ". This is NOT the Fuel Injector Pressure Sensor, it is the FUEL TANK pressure sensor. These are two entirely different sensors.

 

The FTP sensor is a pain to change and very expensive. If you have FORScan or access to a diagnostic scan tool you can monitor the output of the FTP to see if it is in range and reading correctly. I would recommend this before actually changing the FTP sensor.

 

I have been lurking on this thread because I have been having the same issue. I've replaced the canister purge valve and the charcoal canister/vent solenoid/vapor filter. I have a new vapor hose from the charcoal canister to the canister purge valve coming. I really don't want to do the FTP because I looked at the workshop manual and saw you have to drop the fuel tank. Can you please tell me what the correct values are for the FTP, so I can check that in Forscan? Thanks in advance.

 

You can monitor the PCM PID FTP. Any output below 0.1 V or -4.4 kPa [-17.82 "H2O] triggers a sensor fault and DTC P0452. Any output above 4.9 V or 4.0 kPa [16.06 "H2O] triggers a sensor fault and a DTC P0453.

The best check is to open the fuel tank to atmosphere using the auxiliary white funnel and monitoring the pressure which should read 0 (or very close to it depending on the output circuit condition). At 0 kPa the output voltage should be 2.63 V.

BTW, I had a P2450 (the only DTC) and changed out the vapor blocking valve per TSB 18-2387. Immediately afterwards I got a P0453 and checking the FTP I have a constant 4.2 kPa tank pressure (which corresponds to Vref of 5.0 V) even when the tank is open to atmosphere. I have a new FTP sensor tube which should be here tomorrow. Both the Vapor Blocking Valve tube and the FTP tube are expensive. I changed the Vapor Blocking Valve without completely removing the fuel tank. I just lowered it down several inches and worked on it that way. I was super difficult with the lack of space to work. When I change the FTP, I'm going to completely drop the tank.

I'm suspecting the FTP was the original problem as the Vapor Blocking Valve worked as it should when I bench tested it after changing it out. Sure hope the new FTP solves the problem.

 

Thank you sir. I'll plug in my Forscan machine and have a look at it like you did. I have had the P1450 code mixed with a P0442 code. Just don't want to keep throwing parts at it, especially when some of them require a fuel tank drop.

Sorry to derail the thread OP. I'll go back to lurking now.