Service engine soon light is on. I am getting a P0452 code. What can this be?
Dec 22, 2008 at 7:50 PM
2001 GMC Jimmy p0452 code
2001 GMC JIMMY
JIMMYJIMMYJIMMY
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P0452 Evaporative Emission Control System Pressure Sensor Low Input
Could be a bad tank pressure sensor or a bad connection to it.
It is possible to change the sensor without dropping the tank but it isn't easy. You need to put the vehicle on a set of ramps or on jack stands so the rear end is up. Drop the spare for more room. Now use a light and follow the fuel lines to the pump. To the right of the lines you will see the pressure sensor pressed into the pump module. You need a long screwdriver to reach in there and pry it out of the hole. Then you can test it and the wiring. If you need extra room loosen the tank strap retaining bolts DON'T TAKE THEM OUT THOUGH. Clean the connector and replace the sensor. Then reinstall it. Put a dab of silicone grease on the fluted seal before you try to install it.
Could be a bad tank pressure sensor or a bad connection to it.
It is possible to change the sensor without dropping the tank but it isn't easy. You need to put the vehicle on a set of ramps or on jack stands so the rear end is up. Drop the spare for more room. Now use a light and follow the fuel lines to the pump. To the right of the lines you will see the pressure sensor pressed into the pump module. You need a long screwdriver to reach in there and pry it out of the hole. Then you can test it and the wiring. If you need extra room loosen the tank strap retaining bolts DON'T TAKE THEM OUT THOUGH. Clean the connector and replace the sensor. Then reinstall it. Put a dab of silicone grease on the fluted seal before you try to install it.
Dec 29, 2008 at 8:17 PM