What are the 6.0 Powerstroke IPR Valve Symptoms?

The IPR valve controls the flow of engine oil from HPOP into the injectors. So, when it turns bad, the injection is impacted badly. Consequently, you witness symptoms such as stalling engine, rough idling, injection surge, and often poor mileage.

Oil is the engine’s life. It is supplied by the Higher Pressure Oil Pump. However, this higher-pressure oil isn’t suitable for injectors. If the oil flowed directly to the injectors from the HPOP, it would be at very at high pressure causing various problems inside the engine unit.

So, an Injection Pressure Regulator (IPR) is installed in your 6.0 Powerstroke engine. The IPR regulates the oil pressure. However, if it fails to inject the oil at a specific pressure, the your car will encounter multiple issues.

Further, we will explore the major symptoms car owners witness when their IPV valve is failing. Learning about the 6.0 Powerstroke IPR valve symptoms will help you detect the issue early and fix it before any serious problems occur.

5 Symptoms of Failing IPR Valve on 6.0 Powerstroke

Let’s discuss the symptoms in detail so that you can find it easier to spot them.

#1 The Vehicle Fails to Idle Smoothly

One of the most common issues people with failing IPR valves come across is rough idling. Since the faulty IPR valve fails to regulate the pressure of oil, injectors fail to inject smoothly.

As a result, you see a rise and fall of the engine rpm during idling. In that case, the most evident thing to notice is the jumping needle of the tachometer. It continues to move without your acceleration.

#2 The Engine Cranks but Doesn’t Start

In some cases, when the IPR fails, users have reported that their crankshaft turns but it doesn’t start the engine. Normally, this would happen, when your fuel tank is empty. However, when that’s not the case, it points to a failing IPR valve.

If the IPR valve is acting up, it could fail to inject the oil at an appropriate pressure. This will keep the engine from starting.

#3 The Engine May Stall

Another common symptom of a failed IPR valve is a stalling engine. This is not only annoying, but it can be very dangerous as well. In this case, you’ll find the car stalling and getting out of tune suddenly.

To check, whether this is being caused by a failing IPR, you can easily run a few diagnostic tests; the easiest way is checking DTCs.

#4 The Injectors May Surge

A failing IPR valve might end up supplying oil at a higher pressure. In that case, the injectors will surge as oil at higher pressure will combust differently. If this happens, you’ll also experience sudden acceleration while cruising at a steady pace.

Similarly, when the IPR valve fails to pressurize the oil adequately, you’ll find the vehicle cranking for a long time when you prompt it to start.

#5 Poor Mileage

If you observe poor mileage along with other symptoms, then IPR valve is at fault or clogged. When IPR malfunctions, the direction impact is on injectors; they always remain hungry for fuel and continuously intake more fuel. Hence, the car’s mileage significantly drops.

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What to do If You Suspect a Faulty IPR Valve?

If you feel that you have a faulty IPR valve, you should test it right away. The easiest way would be checking the IPR duty cycle percentage. When the IPR is fully opened after starting, it’ll remain around 15%. Once closed, it’ll be at 85%.

If the percentage is higher than 30% when it’s fully opened, there might be a leak in the IPR valve. If that’s the case, get it examined by professional; they can tell you if the it can be repaired or needs a replacement.

Will Replacing a IPR be Expensive?

Yes, replacing an IPR can be moderately expensive as it costs around $200. However, the price may be different based on the vendor you’re getting it from.

Please note that this is price of the component only. You’ll need to pay a ton to the mechanic for installation.

To save some cash, you can try installing it yourself.


1. How Do I Know If My IPR Sensor Is Bad?

Once you encounter any of the symptoms discussed here, you need to get your car diagnosed. Only after performing a thorough check-up you will be able to pinpoint whether the IPR sensor is bad or some other issue is causing all these.

2. What Should IPR Read While Cranking?

By checking the IPR reading, you can ascertain whether the engine is starting as fast as it should and if the valve is in good condition or not.

While performing this diagnosis, you need to focus on the Injection Pressure Regulator percentage. This metric is also referred to as the IPR duty cycle. This should be 15% when it is fully opened. When it’s fully closed, it must read read 85%.

3. What Does The ICP Sensor Do On A 6.0 Powerstroke?

The ICP or Injection Control Pressure sensor is a component of the IPR. This sensor is responsible for sensing the pressure of the oil being fed to the injectors.

An IPR is also considered faulty if its ICP is faulty or damaged.This is because once the ICP reads the pressure of the fuel, it reports the readings back to the central computer. This, in turn, commands the IPR to fine-tune the pressure. If the reading is faulty, the IPR won’t function properly.

4. How Do You Test A 6.0 ICP Sensor?

The best way to test a 6.0 ICP sensor would be to use a Forscan. These tools are expensive, but they’re mostly accurate. There are some cheaper tools that show you the pressure. However, these are often inaccurate as the pressure is mostly inferred.

This is why testing the voltage with Forscan would be the most accurate way to go. The voltage reading will be 500. If there’s a deviation, contact a mechanic immediately.


A stalling car, with rough idling and poor mileage may alert you of some bigger issues. So, always be on alert for these 6.0 Powerstroke IPR valve symptoms.

One you get to the root cause, it’s in your best interest to get it fixed immediately. The more you delay, the further you risk engine damage.

If you don’t have prior experience with diagnosing or fixing your car, we recommend going to a mechanic. Also, don’t rely too heavily on cheap pocket scanners as these aren’t very accurate.

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William Baldwin

This Is William Baldwin, The Founder & Managing Editor of this website. Me and my team share automotive tips, tricks, and news

Fact Checked And Mechanically Reviewed By


Talha Atta

Talha Atta, a Mechanical Engineer and experienced technical content writer and editor at Autoglobes.com with a passion for the automotive industry.