Cracking the Code: Causes and Solutions of P0087 Duramax

The p0087 duramax code can be caused by issues in the fuel system. Potential solutions include checking for leaks, replacing filters, and testing the fuel pressure regulator.

The p0087 duramax code indicates a fuel system problem in the vehicle, which can lead to poor performance and potential engine damage if left unchecked. Common causes of this code include fuel leaks, clogged fuel filters, faulty fuel injectors, and a malfunctioning fuel pressure regulator.

To diagnose and solve the issue, it is important to check all components of the fuel system thoroughly. This may involve inspecting fuel lines, replacing filters, and testing the pressure regulator. Proper maintenance of the fuel system can prevent the occurrence of this code and ensure the longevity and reliability of the vehicle.

Cracking the Code: Causes and Solutions of P0087 Duramax


Symptoms Of P0087 Duramax

Engine Warning Light:

If you see the engine warning light on your dashboard, it could be an indication of p0087 duramax code. If you notice this symptom, it is essential to take it seriously and follow the steps in the next sections to address the issue.

Engine warning light could also indicate other problems, so it is always best to bring it to a professional mechanic for further inspection and diagnosis.

Reduced Power:

When you experience reduced power, it will affect the overall performance of your vehicle. It may become sluggish, and you will notice a lack of acceleration. This is another common symptom of p0087 duramax code, indicating that the fuel system is not delivering enough fuel to the engine.

If this issue persists, it can lead to further engine damage, so it is vital to address it as soon as possible.

Engine Misfire:

The engine misfire is another symptom you may notice with p0087 duramax code. Misfire can cause your engine to vibrate, shake, and lose power. It can occur due to insufficient fuel delivery to the engine or lack of spark caused by a malfunctioning spark plug or fuel injector.

If you notice your vehicle operates erratically, it is best to consult a professional mechanic immediately.

Hard Starting:

If you experience difficulty starting your duramax engine, it could be a sign of the p0087 code. Hard starting may result from the fuel system’s inability to generate enough fuel to the engine, so it struggles to ignite. A prolonged hard start can overwork the starter motor and affect your vehicle’s overall performance, so it is crucial to have it checked immediately.

Slow Acceleration:

Slow acceleration is another symptom you may notice with p0087 duramax code. It can lead to poor vehicle performance and, in worse cases, cause an accident. Slow acceleration occurs due to an insufficient amount of fuel delivered to the engine.

You may notice that your vehicle needs additional time to speed up and achieve its maximum potential.

The symptoms of p0087 duramax code are essential to address for the smooth running of your vehicle. If you notice any of these symptoms, it is essential to seek the help of an experienced mechanic to diagnose and fix the problem quickly.

Ignoring these symptoms could result in further damage to your engine and put your safety at risk.

Causes Of P0087 Duramax

Are you wondering why your duramax is throwing the p0087 code? This code indicates a fuel rail pressure system malfunction. The fuel system is responsible for delivering fuel to the engine, and any issue in this system can cause a p0087 code.

Here are the possible reasons for this problem:

Injector Problems

The fuel injectors are essential components of your duramax’s fuel system. They are responsible for spraying fuel into the engine cylinders. Injector problems can cause a p0087 code in the following ways:

  • Dirty or clogged injectors can reduce fuel flow and cause low fuel pressure.
  • Faulty injectors may not function correctly and can over or under fuel the engine.
  • Leaky injectors can allow fuel to pass through and affect the fuel pressure in the fuel rail.

Fuel Pump Failure

The fuel pump’s primary role is to transfer fuel from the fuel tank to the engine. A defective or failing fuel pump can cause a p0087 code in several ways:

  • A failed fuel pump can cause low fuel pressure, resulting in a p0087 code.
  • A clogged fuel filter or faulty fuel pressure regulator can cause the fuel pump to work harder, leading to its eventual failure.

Fuel System Leak

A fuel system leak can cause a decrease in fuel pressure, leading to a p0087 error code. A leak can develop in the fuel system due to the following reasons:

  • Corrosion of components in the fuel system.
  • Damage to fuel lines or connections.
  • Faulty fuel injectors or fuel pressure regulator can cause excess pressure in the fuel system, leading to leaks.

Fuel Pressure Sensor Malfunction

The fuel pressure sensor is responsible for measuring the fuel pressure in the fuel rail. A malfunctioning fuel pressure sensor can cause a p0087 code in the following ways:

  • If the sensor is reading incorrect fuel pressure, the engine control module (ecm) may reduce the rail pressure, triggering the p0087 code.
  • A faulty sensor can send an error signal to the ecm, leading to reduced fuel pressure and a p0087 code.

If you encounter a p0087 code in your duramax, it’s essential to address the problem promptly. Failure to address this issue can lead to severe engine damage. We hope that this article has provided you with a comprehensive understanding of the causes of p0087 duramax code.

Diagnosing P0087 Duramax

If you are experiencing a p0087 code on your duramax, identifying the root cause is essential to avoid costly repairs. In this section, we will discuss the key steps to diagnose and fix a p0087 code.

Inspection Of The Fuel System

To begin with, inspect the fuel system to check for any visible damage or leaks. Here’s what you need to do:

  • Check the fuel lines and fittings for any visible damage.
  • Inspect the fuel tank for leaks.
  • Verify the fuel cap is locked and in good condition.

Use Of Diagnostic Tools

Using diagnostic tools to troubleshoot the duramax p0087 code is an easy and incredibly accurate process. Here’s what you need to do:

  • Connect the scan tool to the vehicle’s obd-ii port.
  • Retrieve the dtc (diagnostic trouble code) from the tool.
  • Interpret the code and follow the diagnostic steps outlined in the tool, which are usually available online.

Checking Fuel Pressure

Checking the fuel pressure is the most reliable diagnostic method to uncover the cause of a p0087 code. Here’s what you need to do:

  • Connect a pressure gauge to the fuel rail test port.
  • Turn the ignition to the on position, but do not start the engine.
  • Observe the fuel pressure reading, which should be within the manufacturer’s specification.
  • If the fuel pressure is low or there are pressure fluctuations, then the fuel system has a problem.

Identifying Visible Leaks

A leak in the fuel system can result in a p0087 code. To identify visible leaks, follow these key steps:

  • Check around the fuel filter housing and fuel lines for any visible signs of leaking fuel.
  • Inspect the fuel pressure regulator for a damaged diaphragm or leaking fuel.
  • Finally, check the fuel tank for any visible leaks or damage.

Diagnosing a duramax p0087 code can be tricky. However, following the above steps – inspecting the fuel system, using diagnostic tools, checking fuel pressure, and identifying visible leaks – should help you diagnose and repair the issue.

Addressing P0087 Duramax

If you’re a duramax owner, you’ve probably come across the infamous p0087 engine code. It can be frustrating to encounter, especially if you’re not sure about what’s causing it. Fortunately, there are some things you can do to address p0087 duramax and prevent it from recurring.

Here are a few solutions that might help:

Replace Faulty Fuel Components

One of the most likely causes of p0087 duramax is faulty fuel components. If you suspect this is the case, you’ll want to inspect the fuel system thoroughly to identify any problematic parts. Here are some components you might need to replace:

  • Fuel pressure regulator
  • Fuel pump
  • Fuel injectors
  • Fuel filter

Repair Leaks In The Fuel System

Leaks in the fuel system can also be a significant contributor to p0087 duramax. Identifying these leaks can be tricky, but if you suspect this is the issue, here are some areas to check:

  • Fuel lines
  • Fuel hoses
  • Fuel tank
  • Fuel injectors
  • Fuel pressure regulator

Clear The Codes Using Diagnostic Tools

Once you’ve identified and addressed the root cause of p0087 duramax, you’ll want to clear the engine code using diagnostic tools. This should prevent the code from recurring, assuming you’ve fixed the underlying issue.

Tuning The Duramax Engine For Better Fuel Efficiency

Finally, a comprehensive tuning solution can help prevent p0087 duramax from coming back in the future. Tuning can help your engine run more efficiently, reducing the risk of fuel-related problems. Here are some tips for tuning your duramax engine:

  • Use high-quality fuel
  • Optimize fuel injection timing and quantity
  • Upgrade the air intake system
  • Install a higher-flow exhaust system
  • Add a performance chip to improve power and gas mileage

By addressing p0087 duramax using one or more of these solutions, you can keep your duramax engine running smoothly and efficiently. Keep in mind that the sooner you address the issue, the less likely it is to cause further damage to your engine.

Prevention Of P0087 Duramax

Regular maintenance of the fuel system:

The fuel system of an automobile is a key component that should be maintained regularly. Keeping your fuel system clean and adequately lubricated can help prevent issues like p0087 duramax from occurring. Below are some steps you can take to maintain your fuel system:

  • Regularly replace fuel filters
  • Ensure fuel injectors are clean
  • Use fuel system cleaners periodically
  • Check your fuel pump for wear and tear

Use of high-quality fuel:

Another significant cause of p0087 duramax is the use of low-quality fuel. Low-quality fuel can create blockages and impurities, leading to fuel systems issues, including p0087 duramax. Here are some aspects to consider regarding fuel quality:

  • Use high-quality branded diesel fuel
  • Avoid old/dirty fuel
  • Use fuel from reputable dealers
  • Check for fuel adulteration

Upgrade of fuel system components:

Duramax fuel pumps and injectors are known to be the most common causes of p0087 errors. Upgrading these components and adapting newly introduced fuel-saving technologies can help prevent this error. Here are some things to consider:

  • Use high-performance fuel pumps and injectors
  • Install a lift pump and a fuel pressure regulator
  • Switch to bigger fuel lines

Driving habits:

You can prevent p0087 duramax code by developing some good driving habits. Some driving habits that can aid in preventing the duramax code are:

  • Carefully monitor your vehicle’s speed on uphill roads and in places with adverse driving conditions
  • Use your duramax vehicle wisely
  • Do not race your engine regularly

Quick replacement of faulty components:

Faulty components of your vehicle’s fuel system could lead to p0087 duramax. Regular maintenance and quick replacement of problematic fuel system parts can help avoid this. Here are some components to consider checking regularly:

  • Fuel filters
  • Fuel lines
  • Fuel pumps
  • Injectors

Understanding the causes of p0087 duramax code is essential to prevent it from occurring. Maintenance of the fuel system, use of high-quality fuel, upgrading fuel system components, developing good driving habits, and quick replacement of faulty components go a long way in preventing the duramax code.

Frequently Asked Questions For Causes And Solutions Of P0087 Duramax Code

What Is P0087 Duramax Code?

P0087 duramax code is a common problem in diesel engines, which indicates that the fuel pressure is too low or the fuel system is not functioning properly. This error code can lead to engine failure or damage if not addressed immediately.

What Are The Common Causes Of P0087 Duramax Code?

The most common causes of p0087 duramax code are a bad fuel pressure regulator, a clogged fuel filter, a faulty fuel pump, a defective fuel rail pressure sensor, or a damaged fuel injector. It is advisable to seek professional help if any of these signs are noticed.

How Can I Diagnose P0087 Duramax Code?

To diagnose p0087 duramax code, you need to use a diagnostic tool or scanner to read the trouble code. Next, you must check the fuel pressure, fuel lines, and fuel pump. A professional technician can assist you in this process and can also recommend solutions.

How Can I Fix P0087 Duramax Code?

The most common fixes for p0087 duramax code are to replace the fuel pressure regulator, clean or replace the fuel filter, replace the fuel pump, or repair/replace any damaged fuel line. It is advisable to seek help from a professional technician for successful repairs.

Can Bad Quality Fuel Cause P0087 Duramax Code?

Yes, bad quality fuel can cause p0087 duramax code. Bad quality fuel can contain impurities and contaminants that can damage the fuel system components. To prevent this, it is recommended to use high-quality fuel and get the vehicle serviced regularly.

How Can I Prevent P0087 Duramax Code?

To prevent p0087 duramax code, it is important to follow the vehicle manufacturer’s recommended maintenance schedule, use high-quality fuel, and get the vehicle serviced regularly by a professional technician. It is advisable to be mindful of any signs of engine trouble and act quickly to diagnose and repair any potential problems.


Code p0087 duramax can be a frustrating and worrisome issue for any diesel owner. However, with proper diagnosis and maintenance, this issue can be resolved. The main cause of this code is low fuel pressure, which can be due to a variety of factors discussed in the previous sections.

Regular maintenance and inspection of the fuel system can help prevent this code from appearing. Solutions to this code include replacing or cleaning the fuel filters, replacing the fuel pressure regulator, and addressing any leaks in the fuel system. Identifying and fixing the root cause of the issue is important to prevent more significant and costly damages to the engine.

Prompt diagnosis and repair can ensure the longevity and reliability of your duramax engine. Regular care and attention to your fuel system can prevent this code from appearing, ensuring a smooth and efficient driving experience.