Code P0190, where is the Fuel Rail Pressure Sensor located?

Tiny
AL-WITH-A-CAR
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  • 1999 MERCURY COUGAR
  • 2.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 156,000 MILES
I have the error code "P0190 Fuel Rail Pressure Sensor Circuit Bank 1" but the manual I have seems to only mention the older "Fuel Pressure Regulator". Could someone provide me with the updated diagrams and instructions for locating and replacing the Fuel Rail Pressure Sensor?
Sunday, June 8th, 2025 AT 2:39 PM

18 Replies

Tiny
KEN L
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It says the sensor is on the top left rear of the engine which should be on or near the fuel rail. This is what it looks like. Check out the images (below). Let us know if you need anything else.
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Sunday, June 8th, 2025 AT 3:02 PM
Tiny
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So from my understanding, I may need a specialized tool to disconnect it? If this is true, could you perhaps link one or say if there's a more common tool that could be substituted?
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Monday, June 9th, 2025 AT 1:42 PM
Tiny
KEN L
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If there is a fuel line connected to it then yes you need to remove it, this video can help:

https://www.youtube.com/watch?v=Boi0DPXVHbM

If not and it is bolted to the fuel rail you will be okay to remove it.
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Monday, June 9th, 2025 AT 4:40 PM
Tiny
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Do you know where I might buy the fuel-line disconnection tool for cheap?
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Monday, June 9th, 2025 AT 5:32 PM
Tiny
KEN L
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Here is a great set for $24.00:

https://amzn.to/43TIa7F

Let us know how it goes.
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Tuesday, June 10th, 2025 AT 11:48 AM
Tiny
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So finally got the part, replaced it, and now the car has a constant p1000 code. It cranks but won't start.
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Wednesday, July 16th, 2025 AT 5:27 PM
Tiny
KEN L
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So you replaced the part and now it wont run, did it run before? If so it sounds like you have a defective part.
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Thursday, July 17th, 2025 AT 10:04 AM
Tiny
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Last time I worked on it, (before replacing the part) it started after about 3 tries, ran for a few minutes, then died and refused to start again. Although it of course did not have the p1000 code until after this part replacement.
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Thursday, July 17th, 2025 AT 5:43 PM
Tiny
KEN L
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Does it have any other codes besides the p1000? You could have a defective PCM. Please go over this guide

https://www.2carpros.com/articles/scan-test-is-incomplete-p1000

Let us know how it goes
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Friday, July 18th, 2025 AT 9:05 AM
Tiny
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It does not have any further codes besides the p1000 no. As for symptoms, the engine when turning over sounds as if it may not be receiving fuel? I cannot accurately listen for the fuel pump when inserting the key either, due to the CD player making a 'fun' noise for a while after insertion of the ignition key. The last symptom I can remember is the low battery light being on the entire time, as I had to try to jump the car with another running vehicle due to its battery being flat out dead and not holding charge.
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Friday, July 18th, 2025 AT 2:11 PM
Tiny
KEN L
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The CD player can make the battery go dead fyi. Lets use this video to show you how to see if the fuel pump is working or not.

https://www.youtube.com/watch?v=lXLJbuAZ4CE&t

Please go over this guide and get back to us.

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Saturday, July 19th, 2025 AT 9:32 AM
Tiny
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So the engine begins to start and runs for as long as starter is sprayed into the intake (a few seconds). This would mean the issue is in the fuel delivery correct? If this is the issue, it's likely the fuel pump yes?
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Monday, July 28th, 2025 AT 4:26 PM
Tiny
KEN L
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Yes, but I would check the inertia switch as well which is at the right side kick panel. Check out the images (below). Please let us know what happens.
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Monday, July 28th, 2025 AT 5:20 PM
Tiny
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Okay, what does that switch perform, and where precisely is the panel located?
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Monday, July 28th, 2025 AT 5:36 PM
Tiny
KEN L
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This switch is a safety feature, it cuts power to the fuel pump when in an accident. Push the button on top of it to reset it. It is behind the right side kick panel.
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Tuesday, July 29th, 2025 AT 10:26 AM
Tiny
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Where exactly is that located?
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Tuesday, July 29th, 2025 AT 4:49 PM
Tiny
KEN L
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It is behind the right side kick panel. Have you removed the panel? The panel is on the right side footwell rear the door
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Wednesday, July 30th, 2025 AT 9:27 AM
Tiny
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So, if it's not the switch, what next?
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Wednesday, July 30th, 2025 AT 1:28 PM

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