P0087 – Fuel Rail/System Pressure Too Low

When your vehicle’s Engine Control Module (ECM) records a code of P0087, it means that the fuel pressure in the system is below specification. This can lead to symptoms such as a misfire, rough running, and lack of power on acceleration.

The P0087 code can be triggered by various causes, including a weak fuel pump, clogged filter or screen, faulty fuel pump driver module, and a faulty fuel pressure sensor. To diagnose the issue, you can test the fuel pressure at the fuel rail or line, inspect all fuel lines, and check for a damaged fuel filter or fuel tank. If you’re unsure of the problem, it’s best to schedule an appointment with a professional mechanic for further testing and accurate cost estimation for repairs.

Key Takeaways:

• Fuel pressure below specification can trigger the P0087 code
• Possible causes include a weak fuel pump, clogged filter or screen, faulty fuel pump driver module, and a faulty fuel pressure sensor
• Diagnosis involves testing fuel pressure, inspecting fuel lines, and checking for damaged components
• Consulting a professional mechanic is recommended for accurate diagnosis and cost estimation

Symptoms of P0087

When the P0087 code is triggered, you may experience several symptoms that indicate a fuel pressure issue in your vehicle’s system. It is essential to recognize these symptoms promptly to address the problem and prevent further damage. The most common symptoms of P0087 – Fuel Rail/System Pressure Too Low include:

1. Misfire: The engine may misfire, causing irregular and uneven combustion, leading to a rough running condition.
2. Rough Running: Your vehicle may exhibit rough idling, hesitation, or stalling, especially when starting or accelerating.
3. Lack of Power: You may notice a significant decrease in power and performance, particularly during acceleration or when climbing steep inclines.
4. Misfire: A lean fuel condition resulting from low fuel pressure can cause the engine to misfire, leading to a loss of power and overall poor performance.

These symptoms indicate a lack of adequate fuel pressure in the system, which can disrupt the combustion process and compromise the engine’s efficiency. Ignoring these symptoms may lead to more severe engine damage over time.

Observing any of the above symptoms suggests the possibility of a P0087 code being triggered in your vehicle. To prevent further issues and ensure your safety while on the road, it is crucial to have the fuel pressure problem diagnosed and repaired by a qualified mechanic or automotive technician.

Causes of P0087

The P0087 code can be caused by several factors. Common causes include:

• Clogged fuel screen or filter
• Failing fuel pump
• Restricted fuel line
• Defective fuel pressure sensor

These issues can disrupt the proper delivery of fuel to the engine, resulting in low fuel pressure.

To better understand these causes, let’s take a closer look at each one:

Clogged Fuel Screen or Filter

A clogged fuel screen or filter impedes the flow of fuel and can lead to a decrease in fuel pressure. Over time, dirt, debris, and other contaminants can accumulate in the fuel system, causing blockages. Regular maintenance, including fuel filter replacement, can help prevent this issue.

Failing Fuel Pump

A failing fuel pump can also contribute to low fuel pressure. As the fuel pump ages, it may become weaker and unable to adequately supply fuel to the engine. This can result in a decrease in fuel pressure and cause the P0087 code to appear. In such cases, replacing the fuel pump is necessary.

Restricted Fuel Line

A restricted fuel line can restrict the proper flow of fuel and lead to lower fuel pressure. This restriction can occur due to a buildup of contaminants or a physical blockage in the fuel line. Identifying and removing any obstructions or replacing the fuel line may be required to resolve the P0087 code.

Defective Fuel Pressure Sensor

A defective fuel pressure sensor can provide inaccurate readings, leading to incorrect fuel pressure readings and triggering the P0087 code. Replacing the faulty sensor can rectify this issue and restore proper fuel pressure measurement.

Comparison of Causes for P0087

Identifying and addressing the specific cause is essential to resolve the P0087 code and ensure optimal performance of your vehicle’s fuel system.

Diagnosis of P0087

To accurately diagnose the P0087 code, you have several options available. One recommended approach is to book a diagnostic check with a trusted mechanic. Alternatively, if you have an OBD-II scanner, you can perform the diagnosis yourself. Follow these steps to identify and address the issue:

1. Scan the system for other OBD-II codes: Start by scanning the system for any additional codes that may be present. This can provide valuable context and help uncover any underlying issues.
2. Clear fault codes and conduct a test drive: Clear the fault codes and take the vehicle for a test drive while monitoring live data. Pay close attention to any abnormalities or fluctuations in fuel pressure readings.
3. Visually inspect the fuel tank, lines, and filter: Perform a visual inspection of the fuel tank, fuel lines, and fuel filter. Look for any signs of damage, leaks, or restrictions that could be causing low fuel pressure.
4. Take manual fuel pressure readings: Use a fuel pressure gauge to manually measure the fuel pressure at the fuel rail. Compare the readings with the manufacturer’s specifications to determine if the pressure is within an acceptable range.
5. Perform a fuel pump test: Conduct a fuel pump test to assess its functionality. This test can help determine if the fuel pump is delivering fuel at the correct pressure and flow rate.

By following these diagnostic steps, you can pinpoint the root cause of the P0087 code and proceed with the appropriate repairs or replacements.

Repair of P0087

Once the specific cause of the P0087 code is identified, appropriate repairs can be made. Common repairs to resolve the P0087 code include:

• Replacing the clogged fuel filter or screen
• Repairing or replacing damaged or kinked fuel lines
• Replacing the faulty fuel pressure sensor
• Replacing the fuel pump

Addressing these issues will help restore proper fuel rail/system pressure, ensuring optimal engine performance. It is recommended to perform a test drive after each repair to ensure the fault code is cleared and the issue is fully resolved. Your trusted mechanic can guide you through the repair process and provide expert assistance.

Illustration: Fuel System Repair Process

By following these repair steps and addressing the underlying causes of the P0087 code, you can restore the fuel rail/system pressure and enjoy a smoother and more reliable driving experience.

Prevention of P0087

While there are various mechanical reasons for the P0087 code, it is always good practice to maintain your vehicle’s engine through regular car maintenance. By following a few simple steps, you can help prevent or minimize the occurrence of the P0087 code and ensure your vehicle runs smoothly.

Regular Car Maintenance

Regular car maintenance is an essential part of keeping your vehicle in good condition. It involves servicing your car at the recommended intervals and addressing any potential issues before they escalate. By staying on top of your car’s maintenance needs, you can significantly reduce the chances of encountering the P0087 code.

Oil and Filter Change

One of the most important aspects of regular car maintenance is changing the oil and filters. Over time, oil can become contaminated and lose its lubricating properties, which can negatively impact the engine’s performance and fuel efficiency. By regularly changing the oil and filters, you can ensure that your engine stays clean and properly lubricated, reducing the risk of low fuel pressure issues.

Visual Inspection

Performing visual inspections of your vehicle’s engine, wiring, and connectors is another crucial step in preventive maintenance. Look for any signs of damage, wear, or loose connections that could potentially lead to fuel system issues. By catching these problems early on, you can prevent them from developing into larger, costlier issues.

Proper maintenance, especially checking and maintaining the fuel filter, can help prevent or minimize the occurrence of the P0087 code and ensure your vehicle runs smoothly.

By consistently practicing regular car maintenance, including oil and filter changes and visual inspections, you can significantly reduce the chances of encountering the P0087 code. Taking proactive steps to keep your vehicle in optimal condition not only helps prevent fuel pressure issues but also improves overall performance and extends the lifespan of your car.

Tips for Preventing P0087

By implementing these preventive measures, you can keep your fuel rail/system pressure within the specified range, avoiding the P0087 code and promoting the optimal functioning of your vehicle’s fuel system.

Conclusion

The P0087 code, indicating low fuel rail/system pressure, can have a significant impact on your vehicle’s performance and drivability. To ensure your safety and avoid further issues, accurate diagnosis and prompt repairs or replacements are essential. Regular preventive maintenance plays a vital role in preventing the occurrence of the P0087 code and maintaining the proper functioning of your vehicle’s fuel system.

By scheduling routine oil and filter changes, conducting visual inspections, and checking the fuel filter, you can minimize the risk of experiencing low fuel pressure issues. These preventive measures help keep your fuel system clean and efficient, ensuring optimal fuel pressure delivery to the engine.

If you’re unable to obtain professional assistance for diagnosis and repairs, an alternative solution may be to upload your Engine Control Unit (ECU) file to permanently remove the P0087 code. However, consulting a qualified mechanic is highly recommended to accurately identify the underlying cause and address it effectively.