Last Updated on February 22, 2023
A fuel rail pressure sensor (commonly known as a fuel pressure sensor) is used in many diesel and some gasoline engines. This sensor is usually located near the middle of the fuel rail and is linked to the engine control unit (ECU), which is the central computer of a vehicle.
It shouldn’t be confused with the fuel tank pressure sensor which is located inside or on top of the fuel tank.
So what happens when the fuel rail pressure sensor goes bad and how will you know? Keep reading to see what a fuel pressure sensor does and common symptoms to look for with a faulty fuel pressure sensor.
What Does a Fuel Pressure Sensor Do?
The purpose of this sensor is to keep track of the fuel pressure within the fuel rail. As the sensor detects this information, the data gets transmitted to the engine control unit.
From there, the computer will analyze the data and make the necessary changes to the timing of the fuel injections and the quantity of the fuel being injected. This allows for optimal engine performance for the current driving conditions.
The engine control unit will specify the correct amount of fuel that the engine needs. If more fuel than necessary is injected into the combustion chamber, your fuel economy worsens.
Not only that, but the lifespan of emissions related parts decreases and excess carbon emissions are expelled into the atmosphere.
Since most vehicles on the road today are made to be as environmentally friendly as possible, this makes the fuel rail pressure sensor a vital component that must remain functional at all times.
See Also: 3 Symptoms of a Faulty Fuel Sending Unit
Top 5 Symptoms of a Bad Fuel Pressure Sensor
If there is a problem with the fuel rail pressure sensor, the engine control unit won’t be able to do its job properly. Here the 5 most common signs of a bad fuel pressure sensor.
#1 – Check Engine Light
When your fuel rail pressure sensor goes bad, the “Check Engine” warning light may illuminate on your dashboard. This light activates whenever the engine control unit detects an issue within the vehicle that affects the engine in some way.
This doesn’t always mean the engine itself is bad, but rather something else in the vehicle which is not allowing it to do its job properly. You probably won’t know it is the fuel rail pressure sensor at first but using a diagnostic scan tool can often confirm the issue.
P0190, P0191, P0192, P0193, and P0194 are the most common DTC codes indicating an issue with the fuel rail sensor.
#2 – Difficulty Starting Engine
If you have a bad fuel rail pressure sensor, the ECU won’t send the right amount of fuel to the engine. This will make it difficult to start your vehicle.
When this problem first occurs, it will probably take a couple attempts cranking the engine before it starts. But as the problem gets progressively worse, it will take more and more attempts to start. Often, it may start then immediately shut off. Eventually, the engine won’t start at all.
#3 – Weak Acceleration
When you step on the gas pedal and the vehicle does not accelerate like it’s supposed to, then you could have a bad fuel pressure sensor.
The engine control unit is not able to transmit the signal properly to the fuel system because it gets inaccurate information from the sensor. That means it won’t know how to accommodate the fuel demands being placed on the engine.
#4 – Stalling
Engine stalling might occur as the fuel rail pressure sensor goes from bad to worse. You will be driving and then suddenly, your engine will stall. It may also stall while idling.
This will make driving extremely difficult (and dangerous) and it should motivate you to do something about it. Take your vehicle to the nearest auto shop right away and get your sensor replaced if it turns out to be the cause.
#5 – Bad Fuel Mileage
When your fuel pressure sensor doesn’t work like it should, you’ll notice a considerable reduction in fuel economy and mileage.
Either your engine control unit will send too much fuel or not enough fuel through the fuel rail and into the combustion chamber. You will quickly notice more trips to the gas station and more money out of your pocket.
Those will larger vehicles will usually notice a reduction in fuel economy the most. For instance, the fuel economy of a Duramax engine will be affected more noticeably than something like a Honda Civic.
See Also: How to Fix a Malfunctioning Gas Gauge
Fuel Sensor Replacement Cost
The cost to replace a fuel rail pressure sensor can vary quite a bit depending on make and model of your vehicle. On average, expect to pay between $200 and $340 total for a fuel rail pressure sensor replacement.
Parts alone will set you back about $60 to $100 and the labor cost to replace the sensor will cost between $140 and $240.
Of course, you’re usually going to pay more when you have a dealership perform the work compared to an independent mechanic. Unless you have a good amount of auto repair experience, you should not attempt replacement yourself in most cases.
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58 thoughts on “5 Symptoms of a Bad Fuel Rail Pressure Sensor (and Replacement Cost)”
Thank you for sharing this information, it has been very useful.
I have A 2012 Volvo S 60 T5 it has showed codes for fuel pump sensor and fuel pressure regulator now the check engine light is off and not showing any codes it will crank run for a little bit and then cut off crank cut off. I’ve noticed the acceleration isn’t what it used to be and it just feels like it’s having trouble doing what it should be able to do someone please help
You’re probably going to need a professional diagnosis on this one, from someone who can see the vehicle in person and hook up their own scan tool.
I have KIA sorento Diesel engine 2005 model. It has weak cracks and can’t pump fuel to the injectors. It’s failing to start. Can you advise…
I have a 2016 Range Rover Sport. Experienced all of the symptoms above. Got the Restricted Performance Error message on the dash, car would slow down and the stall all together.
Dealer says its a bad Fuel Rail Sensor, but they have to replace the entire Fuel Rail at a huge cost.. sounds bogus to me.
Can anyone confirm that the sensor on a ’16 Range Rover Sport can be replaced without the entire Fuel Rail?
I have issue with my Audi Q7 Premium 2008 after engine light come on I plug OB2 test and read code tell me P0190 Fuel rail pressure sensor change the unit and also I repair fuel pump, fuel filter reset code the vehicle run for about 10 min then shut down then I tried to re-started again wont turn over. Can anyone help help… Thanks
Can you do a fuel pressure test to see if your fuel pressure is actually low? That may tell you if it is a sensor or a mechanical issue that is causing low fuel pressure.
I am getting a P0183 fuel temurature sensor and the ford people are telling me twice now, that the temperarure sensor is part of the fuel rail pressure Sensor. Does that seem right..
Yes that sounds right. Some of those sensors are dual purpose. Which year and model is your Ford?
If it’s got 4 wires then it’s fuel rail pressure temp sensor.
Pin 3 temp, pin 1 pressure, 4 sig return, 2 ref voltage.
3 wire is just pressure sensor. There’s a you tube video, cheap ones from amazon can be defective, or eBay, seems doable to replace self, while running pull out fuel pump fuse, put rag underneath disconnect vacuum hose remove bolts, pop in new one, a mechanics gonna want 200$. I replaced one for pressure code now I got temp code, two years later, I don’t notice any loss of gas mileage maybe it runs too fast warming up cause it thinks it’s always 0 degrees out ,?
I changed my 1az-fse engine fuel electric pump,filter and pressure senior,power flow to pump but my car not start why.
I’m not sure I understand what was changed, but it sounds like several things at once. Test to make sure all parts you swapped are good. If you changed the engine, make sure you’ve connected all hoses and electrical connectors. Check to make sure you have spark.
I am having problem with my Mazda cx-7 fuel rail circuit p0463. I want to know if the circuit plug can also be affected.
I’m not sure I understand the question. Check out this article for a list of symptoms and causes of this code: http://cartreatments.com/p0463/
If my fuel sensor goes out, do I need to replace my fuel pump too?
You’re probably fine to leave the fuel pump alone unless you’ve noticed a separate issue with the fuel pump, such as a consistent lean air/fuel ratio, or hesitation as you give the vehicle more gas.
I have a 91 alegro bay motorhome commins deisel 5.9 I’d does not want to start can it be the injectors pump pressure censor
I have a 2017 Mazda 3 I have been repairing I got it from a auction I changed fuel rail and fuel pressure sensor and injectors with some used ones but when I start the car it jerks and tumbles plus at the moment it starts it lets out a small cloud of white smoke from the exhaust and I have to wait for a little bit before it starts to accelerate normally
Be sure the parts you’ve replaced are the correct parts for that engine. I know someone who bought a CX-5 from auction and sourced an intake from a 2.0L motor, assuming it was the same as the 2.5L intake. The car ran very poorly until the correct intake was used.
Is it throwing any codes? I’d see if I could figure out if the air fuel ratio is in the right ballpark with an OBD2 scanner. There could be a vacuum leak somewhere or an issue with the high pressure fuel pump. Any codes may point you in the right direction as well.
I have 04 F150, 5.4L cranks no start. It’s has good compression, dood battery, good spark, good fuel pressure “ 50 psi “ showed on fuel gauge attached to the fuel rail but showed 10 psi on my scan tool connected to obd 2
I have a toyota dyna So5D its killing the rail pressure sensor rapidly 3 times a month
What can be the main problem n what can I do .
I have a 04 mustang gt convertible check engine light came on had it check fuel rail pressure sensor code replaced it still throwing the code put new spark plugs ,fuel filter took it to the Ford garage said it was a bad feul injector replaced it still throwing the code I’m stumped need some help
I have a 2014 hino truck when ever i come to a complete stop it struggle to move i get no code, what can i do.
I have a bmwx5 and fuel rail error read at mechanics. Can you put fuel stabilizer in tank to help clean sensor?
where is the fuel rail pressure sensor located on a 2008 350 E-series 5.4 Litre gas?
I have replaced mine 3 times now. Last one was a bosch which I was told is the OEM.
What causes them to keep going bad?
They shouldn’t that often, you might an fuel pump issue, it could also be something related to a wiring issue< harness. Make connection from harness and wiring not damaged. Just some ideas. Worse case your issue is off and on, anotherwords pain to troubleshoot. Thats typically bad wiring, make sure grounding cables, fuses, wiring harnesses in general are secure and connectors not dirty/rusty.
What diagnostic tool can work on most diesel engine car in the philippines? Any recomendation? I bought a 2nd hand hyundai starex and abs light is on all the time. And it doesn’t accelarate properly as it should. I want to find out myself what is wrong. I already cleaned the injectors and egr. I dont want to go to mechanic. For they will surely rip me off
OBD2 is a worldwide standard so almost any scan tool sold in the US should work. Most are compatible with 12v diesel engines. See here: http://cartreatments.com/best-automotive-scan-tool/
I bought a 2019 caravan 2 months ago with 14 miles on it. I took it in a few weeks ago because engine light came on. The service department ordered a part and said it was fuel censor. Two week later van kept cutting off and stalling at every red light. They think the part the put I was defective. Dodge has had the car for 2 weeks and still in diagnostic stage. I am a Uber driver so No income for two weeks. What are my options? I am tempted to buy an $10,000 car for back up because I need to work. Dodge gave me a rental but I can not Uber in it. Not sure I want the van back if it’s is going to have problems this early. The first payment is due in 2 weeks. Only 7000 miles on van. 😥
Did the dealer figure out what the problem was on dodge minivan? Problem is most stealerships like to just RIP people off or many have the worse mechanics at min wage. Like to hear what problem was. Thanks
I replaced the fuel rail pressure sensor the check engine still remain and low power
Have you done a diagnostic scan to read any error codes?
Try changing the throttle body. Worked for me
Any shortcuts for replacing a fuel sensor on a 2011/12 dodge 6.9 cummins
I cant physically get to it.
See if this helps: https://www.cumminsforum.com/forum/4th-gen-powertrain/2106041-fuel-rail-pressure-sensor-replacement-instructions.html
Persistent starting problem after replacing fuel pressure sensor may be due to scv not sending signal(current) to the vehicle ECU. This is required for the adjustment of fuel sent to the injectors. Reset error code twice and try starting the vehicle. Good luck
I have an audi S5 that’s really doing my head in, I have had the car plugged in and the code showed high pressure sensor was faulty, I have had this changed but no difference, car struggles to start and does not like acceleration at all it just jerks the garage have told me they don’t really know what else to try to fix it, anyone got any ideas as iam going out of my mind
Do back pressure check Cats may be clogged
I’m having weak acceleration problems with my 1998 Ford Taurus on restarts and going up hills I read about the fuel rail du think that my problem sounds like that problem
It’s possible. Have the car scanned with a diagnostic tool to start troubleshooting.
Its possibly the EGR,which is a cheap and simple job to do.like wise the fuel pressure sensor cheap to buy and fit on most cars.
thanks for your help always. my car a nissan caravan common rail ddti is not performing well even though I have replaced a fuel pressure sensor
am asking a bad Fuel Rail Pressure Sensor may lead to P0741 ??????
It wouldn’t. P0741 is transmission related.
Hi, i have a 2009 2.0 tdci (140) smax, and the motor crankshaft but doesn’t start hot, i’ve to wait until it comes to 60° to start. I’ve also changed the crank and cam sensor, the ect sensor, and now i see on cold start the rail pressure is 430/450 kPa. On hot the rail pressure is 210 kPa. What can i do? Thanks.
Hi.I have an open vivaro 1,9 cdti the car does start properly when its cold it does pour too much fuel on the engine smoking all the way black smoke and it wouldn’t burn that diesel anymore as its too much then it will just stops for it to start again I must wait for at least 2 hours to start as diesel will be sinked.so its a problem to me I don’t know what could be the problem fuel rail pressure sensor or injectors.
I have replaced a new rail pressure sensor but the car still do not perform. What could be the challenges or next step
I have a 2015 Range Rover Evoque. The engine light is on and the OBDII code reads P0008 (fuel pressure high) and I was told that the fuel rail sensor needs to be replaced. I’ve been quoted around $1500 from a dealership. Is this something that is replaceable at home if I can get the part?
Many times, the fuel rail pressure sensor is an easy replacement without having to remove the fuel rail. I’m not familiar with how the Evoque has it though.
If you feel confident enough, I’d recommend getting a good repair manual (print or online) to see what the process is on your model. http://cartreatments.com/chilton-vs-haynes-best-repair-manual/
I have a feeling you’d be able to do it yourself and probably save a thousand dollars.
most definitely, if you pay more than 30/40 dollars youve been ripped off
I agree. These sensors are just boondoggles for the industry. What did we do in 1975?
Do a diagnostic check
I think your problem might be fuel pressure regulator
I have Volvo S40- 2010 diesel- 1560 cc.
It goes into limp mode when rpm 20000.
Please let me how I can resolve.
Check your fuel pressure regulator. Based on that code, I think it is a fueling issue you’re experiencing. You could try hooking up a scanner to check fuel trims as well to see if it’s running too rich or lean.
Replace sensor still won’t start
Fuel filter replacement and or fuel pump replacement.
Oxygen sensors. And ur good.