P0453 Code After Replacements & Testing
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P0453 Code After Replacements & Testing
Good evening,
Problem One:
I have a code:P0453 recurring on my 1997 F150 4.6L. I replaced the Canister Vent Solenoid and the Fuel Pressure Sensor when I replaced the tank, while also clearing out the canisters and re-running the line to the EVAP Purge Valve on the firewall (I figured I was already working there and the prior owner was a MacGyver).
The wires to the Purge Valve report 11.62
Resistance on the Purge Valve reports: 31.62
No other Codes
The Purge Valve is the only part I haven't changed. I even replaced the vacuum line from the Purge Valve to the intake manifold. Am I missing something?
Problem One:
I have a code:P0453 recurring on my 1997 F150 4.6L. I replaced the Canister Vent Solenoid and the Fuel Pressure Sensor when I replaced the tank, while also clearing out the canisters and re-running the line to the EVAP Purge Valve on the firewall (I figured I was already working there and the prior owner was a MacGyver).
The wires to the Purge Valve report 11.62
Resistance on the Purge Valve reports: 31.62
No other Codes
The Purge Valve is the only part I haven't changed. I even replaced the vacuum line from the Purge Valve to the intake manifold. Am I missing something?
Fleet Owner
Joined: Apr 2008
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From: 0,0,1
Not necessarily, the P0453 means the ECM sees that the EVAP Pressure sensor (or FTP) is above 4.5 volts which is indicating a higher than normal pressure in the EVAP system. From there one has to determine why the pressure is so high. Problems with a sticking purge valve is just one of the things that can prevent pressure from bleeding off, resulting in the higher than normal EVAP pressure. It's one of those, "the ankle bone is connected to the leg bone" scenarios.
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Not necessarily, the P0453 means the ECM sees that the EVAP Pressure sensor (or FTP) is above 4.5 volts which is indicating a higher than normal pressure in the EVAP system. From there one has to determine why the pressure is so high. Problems with a sticking purge valve is just one of the things that can prevent pressure from bleeding off, resulting in the higher than normal EVAP pressure. It's one of those, "the ankle bone is connected to the leg bone" scenarios.
As to why I'm working at the Valve, that's because it's the only device I've not change out. I cannot think of anything else, that's why I posted. The ohms/volts seem to be within tolerance, though.
Fleet Owner
Joined: Apr 2008
Posts: 24,318
Likes: 5,128
From: 0,0,1
All the code is telling you is that according to the sensor the EVAP pressure is too high. That could mean the sensor is no good or it could mean the EVAP pressure is too high. Your first step would be to determine if the EVAP pressure is too high, because if it is then the sensor is doing what it's suppose to be doing by reporting a problem.
Hotshot
Joined: Jan 2004
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From: St Louis
Not necessarily, the P0453 means the ECM sees that the EVAP Pressure sensor (or FTP) is above 4.5 volts which is indicating a higher than normal pressure in the EVAP system. From there one has to determine why the pressure is so high. Problems with a sticking purge valve is just one of the things that can prevent pressure from bleeding off, resulting in the higher than normal EVAP pressure. It's one of those, "the ankle bone is connected to the leg bone" scenarios.
HX33 DTC P0453: CHECK FOR HIGH FTP SENSOR VOLTAGE
Diagnostic Trouble Code (DTC) P0453 indicates that Self-Test has detected a FTP circuit input above the maximum.
Possible causes:
FTP open.
FTP short to VREF or VPWR.
VREF shorted to VPWR.
SIG RTN open.
Damaged FTP sensor.
Damaged PCM
Diagnostic Trouble Code (DTC) P0453 indicates that Self-Test has detected a FTP circuit input above the maximum.
Possible causes:
FTP open.
FTP short to VREF or VPWR.
VREF shorted to VPWR.
SIG RTN open.
Damaged FTP sensor.
Damaged PCM
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