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Stock 1995 - 2001 Explorers Questions related to non-modified 1995-2001 Explorer, Mountaineer, Ranger and '02+ Sports and Sport Trac. Problem solving, maintenance, TSB, service bulletins, owner reviews, specifications.

Evap emission Control Sys Pressure Sensor

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Old 06-19-2009, 04:53 PM   #1
Born in Queens,NY raised in Lithonia,Ga
1998 Explorer Sport
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Talking Evap emission Control Sys Pressure Sensor

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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Old 06-19-2009, 05:09 PM   #2
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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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