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Evap emission Control Sys Pressure Sensor

Discussion in 'Stock 1995 - 2001 Explorers' started by bigglok03, June 19, 2009.

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    1. bigglok03

      bigglok03 New Member

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      Born in Queens,NY raised in Lithonia,Ga
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      1998 Explorer Sport
      I took my 98 Explorer Sport to get an emissions test and I failed. The code it came back with was P0453(Evap Emission Control Sys Press Sensor High Input). How would I go about fixing this? Is it as simple as replacing the sensor?
       
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    3. Dilbert5

      Dilbert5 Active Member

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      before yo replace the sensor, you need to check voltages. Do you have a DVM? if so. The sensor has three wires.

      GY/R grd
      BR/W ref voltage
      R/PK sensor output goes to pin 62 or 82 of pcm (my shematic is hard to read, not 100% sure). Verify the correct wire color code.

      You should be able to read the 5 volt ref, then see what the sensor output is reading. According to my schematic, it should be 2.37 v (with gas cap off). If you read something close to this. The next step is to verify the voltage at the PCM.

      My schematic is a little hard to read, hence I am not positive which pin, but you should be able to follow the color code.
       

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