I need help.My car 2018 focus sel.I have problem 

P0453

Evaporative Emission System Pressure Sensor/Switch High

 

how can i fixed this problem

If it's a 2018 Focus is not under warranty? Take it back to your dealer and get them to check it out 👍

12 hours ago, MasterTechTip said:

If it's a 2018 Focus is not under warranty? Take it back to your dealer and get them to check it out 👍

no my friend dont have warranty.Because i livedin iraq but car second hand imported usa 🙂 

 

Not heard of this fault before. Check the wiring around the plug and make sure the connector looks good, if everything looks okay I'd replace it. It shares it's live feed with lots of other components so if they're all o.k. and not logging fault codes it's same to assume the live feed is o.k. 

35 minutes ago, MasterTechTip said:

Not heard of this fault before. Check the wiring around the plug and make sure the connector looks good, if everything looks okay I'd replace it. It shares it's live feed with lots of other components so if they're all o.k. and not logging fault codes it's same to assume the live feed is o.k. 

I checked this parts.seemingly everything is normal. When I measure with the device, 12 volts comes out and - 3 volts between tip and ground is normal?

when i unplug the socket it gives different error code

So on one pin you have 12 volts and the other other you have 3 volts? If this is correct then there is a wiring issue between the plug and the PCM. I'd imagine if the PCM is grounding this circuit when it's active you should have 12 volts on one pin and 0.1 volts on the other. It still is possible the sensor is faulty and giving out a bad reading or even the PCM is faulty and not grounding it properly.

If possible it would be best if you could get another sensor and fit it to your car to see if it fixes it otherwise it will get complicated

53 minutes ago, MasterTechTip said:

So on one pin you have 12 volts and the other other you have 3 volts? If this is correct then there is a wiring issue between the plug and the PCM. I'd imagine if the PCM is grounding this circuit when it's active you should have 12 volts on one pin and 0.1 volts on the other. It still is possible the sensor is faulty and giving out a bad reading or even the PCM is faulty and not grounding it properly.

If possible it would be best if you could get another sensor and fit it to your car to see if it fixes it otherwise it will get complicated

thank you very much Luke 🙂 I will first check the cable harness and then order new sensor