P2291 6.0 Powerstroke Error Code Meaning With Reasons & Symptoms

What does the code P2291 6.0 Powerstroke engine mean? Basically, the P2291 error code on the 6.0 Powerstroke engine means low injector control pressure.

You’re not alone if you own a 6.0 Powerstroke diesel truck and have been experiencing the P2291 error code. This code is one of the most common issues reported in this engine.

The most common reason behind this problem is damaged dummy plugs in the oil rail. Many more reasons will be discussed in this article. This comprehensive guide will also cover general tips for keeping your 6.0 Powerstroke running its best. So, if you’re dealing with this frustrating issue, read on for some helpful information.

P2291 6.0 Powerstroke

Error code P2291 is a diagnostic trouble code for “Fuel Pressure Regulator 2 Performance”.

Numerous factors can cause this; thus, a technician must determine the cause for this code to be triggered in your situation. When the engine runs, the fuel pressure should be between 40-60 psi. If the fuel pressure is below this range, it can cause the engine to run rich and trigger the P2291 code.

The P2291 error code on a 6.0 Powerstroke engine happens for the high-pressure oil system of the injectors. When cranking, this error code sets when the high-pressure oil system can’t reach a minimum of 500 pounds per square inch.

Reasons Behind The P2291 Error Code On The 6.0L Powerstroke EngineSymptoms You Can Face
Dummy plugs in the oil rail or damagedHard to start and runs rough
Bad high-pressure oil pumpsCrank before starting
Torn injection pressure regulator valveWill not start
Leaks in the high-pressure oil systemTough to start hot after the vehicle pulls a heavy load
Faulty turbocharger wastegate solenoidProduce a loud whistling noise when the wastegate is open

In detail, let’s check out the P2291 6.0 Powerstroke issues, symptoms, and solutions in details.

Dummy Plugs In The Oil Rail Are Damaged

Sometimes, you can see that your 2006 Ford F-250 Super Duty truck with the 6.0L Powerstroke engine is hard to start and runs rough. You will also get the P2291 error code. This problem happens when dummy plugs in each head’s oil rails get damaged.

As a result, the o rings of the plugs break apart and leak oil. This issue starts as an extended warm crank of the truck, then a long cold crank, and then a no start. In this case, you need to replace the dummy plugs to solve the 2006 6.0 Powerstroke P2291 issue.

Bad High-Pressure Oil Pumps

The accumulation of sediment and debris represents the most frequent cause in the oil pump, which can eventually cause it to fail. Another possible cause is a faulty or damaged ICP sensor, which can cause the pump to over-pressurize the oil and eventually die. Finally, a failed high-pressure oil pump can also be caused by a leaking injector or a faulty fuel pressure regulator. If these vulnerabilities aren’t fixed, the engine will likely experience problems starting or running correctly.

We have found out that the 2007 Ford Super Duty F-350 truck can sometimes crank before starting and show the P2291 error code. After starting the car, it runs okay but feels like it is running with less power than expected.

This problem happens when the high-pressure oil pumps (HPOP) are wrong. There are 2 high-pressure oil pumps in the 2007 Ford Super Duty F-350 truck, and both can be bad to cause this issue. You must change the high-pressure oil pumps to fix the P2291 Ford 6.0 Powerstroke problem.

Torn Injection Pressure Regulator Valve

Reasons such as this are among the most frequent behind the 6.0 Powerstroke ICP P2291 problem. Along with the P2291 error code, you will find that your vehicle is not starting. This issue occurs if the injection pressure regulator (IPR) valve is torn.

Over time, the IPR can become damaged or worn down, which can cause it to tear. This can lead to a loss of pressure in the injection system and ultimately cause the engine to misfire or run rough. In certain instances, it can even bring about the complete shutdown of the machine.

Suppose you have any reason to believe that your IPR may be broken or worn. In that case, you must have it inspected as quickly as possible by a trained and experienced technician. They can identify issues and replace valves. To solve this P2291 6.0 Powerstroke no start issue, you are required to replace the torn injection pressure regulator valve.

Leaks In The High-pressure Oil System

Many people have complained that their 2005 Ford F-350 6.0L trucks are only tough to start hot after they pull a heavy load. However, they can drive around comfortably after their car gets started.

They also said they only face this problem when towing with their trucks. This issue occurs when there are leaks in the high-pressure oil system. In this case, you need to reseal the high-pressure oil system to solve the problem.

Faulty Turbocharger Wastegate Solenoid

There are different conceptions of why this is a 6.0 Powerstroke ICP P2291 problem. This solenoid is responsible for controlling the boost your turbocharger produces. It can lead to an excessive increase in your turbocharger. So, if it is not working properly. This can lead to several problems, including engine damage.

In some cases, a faulty wastegate solenoid may also be caused by a problem with the engine’s computer. If the computer cannot correctly control the wastegate, it can cause it to open or close at the wrong time.

A faulty turbocharger wastegate solenoid symptoms include poor engine performance, loss of power, and increased fuel consumption.

You may also hear loud whistling when the wastegate is open. If the problem is not fixed, it can eventually lead to engine damage.

Again, if you suspect your P2291 6.0 Powerstroke engine has a faulty turbocharger wastegate solenoid, it is the highest concern to have it inspected as quickly as possible by a trained mechanic. Trying to fix the problem could worsen and cause further damage to your engine.

A Helpful Tutorial You May Need!

Frequently Asked Questions (FAQs)

Can you bypass IPR valve?

Yes, it is possible to bypass an IPR valve. This can be done by routing the high-pressure oil around the valve or disconnecting the hose leading to the valve. However, doing either of these things will result in reduced engine performance. It may cause damage to the engine over time. Therefore, it is not recommended to bypass the IPR valve.

What causes P2291 on a 6.0L Powerstroke engine?

This error code may show up for many different reasons, and a mechanic will need to figure out what that reason is in your case. Some of the common causes of P2291 are: faulty injector control pressure sensor, the sensor harness for the injector control pressure is broken or exposed, sensor circuit poor electrical connection, failed or damaged high-pressure pump, block high-pressure pump relief valve, faulty injectors, exhaust backpressure too high, intake air leaks, etc.

How do you fix P2291 on 6.0L Ford Powerstroke?

If you’re getting the P2291 code on your 6.0L Ford Powerstroke, there is an issue with the fuel pressure sensor. A dirty or faulty fuel filter is the most likely cause of this problem. It is advisable to replace the gasoline filtration system if it has been some time since you last did so. You should also inspect the fuel pressure sensor to determine whether it is contaminated or has been damaged. Suppose you’re still having trouble after replacing the fuel filter and checking the sensor. In that case, you might need to have your truck diagnosed by a professional.


Despite the fact that the significance of the error code P2291 6.0 Powerstroke meaning is not yet completely understood, it is abundantly evident that these trucks have several serious problems. If you own this and suffer any of the symptoms mentioned earlier, you can also understand what’s going on. Additionally, you must get your vehicle serviced as quickly as humanly possible.

We hope that anyone who is using this engine will find these guidelines to be an enlightening and beneficial asset. You’ll learn about an issue others have had and the solutions others have found.

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