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Discussion Starter #1
this 98 sportage throws a Evaporative Emission Control System Pressure Sensor Low Input (code P0452) and don't know what is causing it. a service shop said it doesn't necessarily mean the fuel pressure sensor is bad. anything as minor as a small pinhole in the system could signal this check engine light.

i've read forums and sites about check engine lights due to faulty engine wire harness..."Common problems on this vehicle are failures of the Engine Wire Harness and the Ignition Coils. Failure of the Engine Wire Harness is commonly a faulty wire or splice problem; this can cause a drivability problem or the check engine light to illuminate..." http://autos.msn.com/research/vip/Reliabil...49&src=vip#Engi

i've read one man's solution of checking the ground wiring from the engine to the battery and when he cleaned the contacts, the check engine light didn't come back on for a while. when it did, he attached a redundant ground wire and so far the light has been off. i have yet to try this.

anybody have other suggestions? thank you all
(i accidentally posted this on a wrong model forum so you may see this twice on the site. this is the correct forum now. sorry)
 

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DTC P0452 - Fuel Tank Pressure Sensor Low Output.

Could be a wiring fault or a bad fuel tank pressure sensor.

The problem is that I'm having a hard time tracking down EXACTLY where this sensor is located. I can tell you it's somewhere around the fuel tank. The electrical manual doesn't provide a picture and the shop manual simply shows an "exploded" diagram. If you go to kiausaparts.com it might give a better location.

I would try to track down the problem. I've never seen this trouble code reported on a Sportage. Very unusual.
 

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Discussion Starter #3
Originally posted by Axe Man@Feb 25 2005, 06:49 AM
DTC P0452 - Fuel Tank Pressure Sensor Low Output.

Could be a wiring fault or a bad fuel tank pressure sensor.

The problem is that I'm having a hard time tracking down EXACTLY where this sensor is located. I can tell you it's somewhere around the fuel tank. The electrical manual doesn't provide a picture and the shop manual simply shows an "exploded" diagram. If you go to kiausaparts.com it might give a better location. 

I would try to track down the problem. I've never seen this trouble code reported on a Sportage. Very unusual.
I spoke with a Kia service rep who said the sensor is right above the fuel tank next to the fuel pump. thanks for letting me know that u've never seen this trouble code reported on a Sportage before..it helps me think about it in a different way.

is there a way to test if the sensor is bad once i remove it without having to purchase a new one needlessly? thank you, i appreciate all your help!

also i read that i should open the gas cap for a bit and then screw it back again. that might affect it. i'll try it i guess.
 

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Discussion Starter #4
the ground wiring harness near the engine looked good so i left that alone and i opened and closed the gas cap. neither worked so the car is at the shop now =(
 
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