Q: Where would i see signs of leakage from a faulty fuel pressure sensor?

asked by on March 04, 2017

I have a 2012 Nissan Juke. It started having trouble accelerating. It would cut out when I would go to take off. But only at high RPMs like right before shifting gears. It gradually got worse. Now my car will not accelerate above 3500 RPMs. Torque meter will only go three fifths of the way before I cannot pick up any more speed. It will not go above 3000 RPMs period it's like it just flattens out. I'm having trouble starting my car. I use an OBD2 sensor and the codes it gave were p0090 and p0087 period which indicates low fuel pressure in the rail. I took the intake manifold off and got down to the fuel pressure sensor on the fuel rail but I see no signs of leakage. The only sign I see that could possibly be leakage is on the back of the intake manifold. What do signs of leakage look like and where would I find them? Thank you.

My car has 47000 miles.
My car has a manual transmission.

Fuel Pressure Regulator Replacement $126.81 - $1011.90 Get a Quote

Hello, thank you for writing in. The first thing you want to do is check the electrical connections to the fuel pressure regulator. If the regulator is connected securely, there are no electrical wires exposed or damaged, and it looks dry, then you are likely looking at a failed pressure regulator. If the diaphragm inside is leaking and regulating the fuel, you would see no signs on the exterior. If you were looking an electrical fault with the unit itself, you would also see no physical signs. The only way to test the electrical side of the sensor is with a quality scan tool or a voltmeter. With that being said, if doing this repair at home without tools to test, you are going to have to replace the fuel pressure sensor and test drive the vehicle. For more help with testing or replacing the unit, contact our service department.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car starts and turns off
Hi there. If the engine is cranking over fine and it just will not start then I would start by cleaning out the throttle body. It is common for the throttle body to become dirty over time which can cause...
Losing coolant on a 2003 Dodge Ram 1500
If it's been pressure tested it shows no leaks, the odds are that it's burning. In your case, it's almost always a head gasket that is starting to blow. I've got a video called "How to Tell If Your Head...
Bluish exhaust smoke upon startup
With higher mileage like your vehicle has, the exhaust valve stem seals wear, allowing a tiny amount of oil to seep onto the exhaust valve while the car is sitting. When you start it up, this oil is burned up...
My car just cut off while driving and won't start again
Hello there, a few different faults can cause your 2005 Nissan to shut off while driving. A failing fuel pump is one of the faults that can cause this. Other likely problems would be the battery (https://www.yourmechanic.com/services/battery-replacement), alternator (https://www.yourmechanic.com/services/alternator-replacement), battery...
The engine light is blinking, the car jolts when it car accelerates. And the engine songs like it wants to shut off sometimes
The flashing Check Engine Light tells me that the engine is having a misfire condition occurring. This could be due to bad spark plugs (https://www.yourmechanic.com/services/spark-plugs-replacement) or ignition coils (https://www.yourmechanic.com/services/ignition-coil-replacement) as well as other sensor on the engine reading incorrectly. There...
My 05 base model Kia Rio ran out of gas and wont start.
Hi there. It does sound like the fuel pump may have experienced a failure from running out of gas; it does happen. You mentioned that you removed the pump and inspected it; what test was performed? A fuel pressure test...
Why does my 2012 Chevrolet Sonic only rev to 3500 rpm in park.
This is normal for your vehicle. The vehicle is designed not to be overrevved when it is in park. When you start driving the computer recognizes this and allows it to rev higher. I would not worry about this unless...
I have a 2002 Acura tl 3.2, what can cause the car to do this? Hesitates and then surges con't without my foot on gas pedal.
First check to see if any OBD-II codes have set. A real time scanner can be used to check the operation of the throttle position sensor - TPS (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-throttle-position-sensor). TPS faults are a common cause of the symptoms you are...
Alfaromeo giulietta engine fault code P1064
Hi there. The code you've listed is an OBD-II trouble code that the sensor has detected a fuel pressure problem. In many cases, it's due to a blockage of fuel within the primary fuel rail or the return hose. It...

Related articles

A Buyer's Guide to the 2012 BMW X3
If If you like high-end SUVs, the 2012 BMW X3 is definitely worth taking a look at. It’s a great mixture of luxury, utility and convenience. Key Features The Servotronic power steering on this SUV is excellent for giving you...
A Buyer’s Guide to the 2012 Mitsubishi Outlander Sport
If If you’re looking for an SUV, but don’t need much space or off-road capabilities, the 2012 Mitsubishi Outlander Sport just might be the ticket. With it’s stand-out appearance that is sure to be noticed, it provides the features and...
A Buyer’s Guide to the 2012 Porsche Cayenne Hybrid
For For drivers that want the convenience of an SUV with its cargo space and hauling capabilities, yet still want a car that is fun and responsive to drive, the 2012 Porsche Cayenne Hybrid needs to be added to your...