Code P0452 Set

[Mork]

Says, "Evaporative emission control system, pressure sensor low input"
Anyone ever troubleshoot this or know what dianostic tree to follow?
Thanks.

[skipr]

The Fuel Tank Pressure Sensor responds to changes in the fuel tank pressure or vacuum. This information is used in order to detect vacuum decay or an excessive vacuum during the EVAP diagnostic routing. The fuel tank pressure sensor signal voltage to the Vehicle Control Module (VCM) varies from a minimum of about 0.1 volts with pressure in the fuel tank to above 4.0 volts with a high vacuum in the fuel tank.

The Fuel Tank Pressure sensor display on the scan tool has an auto zero feature which occurs at each ignition cycle and is corrected according to the barometric pressure. Because of this, the Fuel Tank Pressure sensor display may not accurately reflect the actual output of the sensor or the conditions within the fuel tank.

The Fuel Tank Pressure Sensor diagnosis table is intended to isolate and dianose the electrical problems with the sensor wiring or the sensor


Conditions for Setting the DTC
The Fuel Tank Pressure Sensor voltage is less than 0.1 volt for more than 5 seconds.


Action Taken When the DTC Sets
The VCM turns ON the Malfunction Indicator Lamp (MIL) after 2 consecutive driving cycles with the fault active.


Conditions for Clearing the MIL/DTC
The VCM turns the MIL OFF after 3 consecutive drive trips when the test has Run and Passed and not Failed.
A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the start-up coolant temperature and the engine coolant temperature exceeds 70°C (160°F) during the same ignition cycle).
Use the scan tool Clear Information function.
Disconnect the VCM battery feed for 30 seconds.


Do you want the dianostic tree?

[Mork]

Hi Skipr.

Thanks for the indepth response.

The diagnostic routine would be great if you have it.

My Email is [email protected]

Thanks.

[skipr]

Check your e-mail, I sent it.

[Mork]

Thanks Skipr.

It worked well. It was the tank pressure sensor. Best part is that the tank nor the bed has to be touched to remove it, There was enough room brtween the bed and the frame to get my arm up to the top of the tank, unplug the sensor and install the new on in less that 2 minutes. Don't get many breaks like that.
Thanks again.

[azmotorsports]

Originally Posted by Mork

Thanks Skipr.

It worked well. It was the tank pressure sensor. Best part is that the tank nor the bed has to be touched to remove it, There was enough room brtween the bed and the frame to get my arm up to the top of the tank, unplug the sensor and install the new on in less that 2 minutes. Don't get many breaks like that.
Thanks again.

Was the sensor towards the front or the read of the truck and what year was your truck?