DPFE Sensor – 5 Functions, Symptoms And Cost Of Replacement!

Written By: Terrence Hines
Category: Electric

The Differential Pressure Feedback EGR or DPFE sensor is crucial in controlling vehicle emissions, detecting the engine’s exhaust gas recirculation level.

Symptoms like poor performance, engine hesitation, or check engine lights may occur when this sensor malfunctions. The cost of replacement varies but ranges from $60 to $150.

What Is A DPFE Sensor? 5 Major Functions!

The DPFE (Differential Pressure Feedback EGR) sensor is an indispensable component in vehicles primarily designed to monitor and regulate the exhaust gas recirculation system.

Its vital role lies in precisely measuring the pressure difference between the inlet and outlet of the EGR passageway, optimizing fuel efficiency, and effectively reducing harmful pollutants.

The DPFE sensor provides accurate feedback on the EGR system’s performance, ensuring the engine meets emissions standards.

DPFE Sensor - 5 Functions, Symptoms And Cost Of Replacement!

This promotes environmental sustainability and improves vehicle performance and longevity.

The DPFE sensor is vital in modern vehicle technology, ensuring optimal EGR system performance for a cleaner and more efficient driving experience.

1. Exhaust Gas Regulation:

One of the key functions of the DPFE (Differential Pressure Feedback EGR) sensor is to precisely regulate the flow of exhaust gases within the vehicle’s engine.

By continuously monitoring the exhaust gas pressure, the DPFE sensor effectively controls the operation of the Exhaust Gas Recirculation (EGR) valve.

This ensures that the exact and optimal amount of exhaust gases is recirculated into the combustion process, contributing to enhanced engine performance and improved fuel efficiency.

The accurate and reliable regulation provided by the DPFE sensor plays a crucial role in maintaining the overall health and efficiency of the engine system.

2. Fuel Efficiency Maintenance:

The DPFE (Differential Pressure Feedback EGR) sensor maintains vehicle fuel efficiency.

Constantly monitoring exhaust gas pressure ensures the engine receives the correct air-fuel mixture for optimal performance and economy.

If the DPFE sensor fails, it can disrupt the air-fuel mixture, resulting in higher fuel consumption, compromised engine performance, and potentially increased emissions.

Therefore, it is of utmost importance to regularly check and replace the DPFE sensor to ensure the vehicle’s continued fuel efficiency and overall health.

3. Engine Performance Optimization:

The DPFE (Differential Pressure Feedback EGR) sensor, an integral component in optimizing engine performance, ensures the precise air-fuel mixture required for efficient combustion.

By effectively regulating the position of the EGR (Exhaust Gas Recirculation) valve, this sensor enables the engine to operate at its peak potential.

However, in the event of a malfunction, such as incorrect readings or failure to respond, engine hesitation or loss of power can occur, particularly during acceleration.

It is essential to monitor and maintain the proper functioning of the DPFE sensor for optimal engine reliability and performance.

4. Emission Control:

The DPFE (Differential Pressure Feedback EGR) sensor ensures optimal performance when controlling emissions.

The DPFE sensor accurately measures the pressure difference across the exhaust gas recirculation (EGR) system.

Emission Control

It helps regulate the recirculation of harmful exhaust gases into the combustion chamber.

Exercising precise control significantly reduces the emission of harmful gases into the atmosphere.

This facilitates the vehicle’s compliance with emission tests and plays a vital role in fostering a cleaner and more sustainable environment.

5. Engine Diagnostics:

Finally, the DPFE (Differential Pressure Feedback EGR) sensor fulfills a crucial diagnostic role in the vehicle’s emission control system.

The DPFE sensor communicates with the vehicle’s computer system to ensure peak performance and emission standard compliance.

This seamless integration ensures optimal efficiency, allowing for a smoother and more sustainable driving experience.

As soon as any irregularity or malfunction is detected, the sensor immediately activates the check engine light on the dashboard.

This effectively notifies the driver of potential issues that may necessitate attention or maintenance.

This proactive monitoring system helps drivers stay informed and take necessary actions to maintain the vehicle’s performance and environmental efficiency.

DPFE Sensor Symptoms

When the DPFE sensor goes faulty, it can affect your vehicle’s overall performance and efficiency.

This is primarily due to its pivotal role in controlling exhaust gas recirculation, among other critical functions.

Faulty DPFE sensors can cause incorrect exhaust gas pressure readings, leading to engine control module misinterpretation and potentially inaccurate EGR valve regulation.

This can result in an imbalanced air-fuel mixture, causing the engine to run inefficiently and leading to noticeable performance issues. Let’s go into the details:

1. Check Engine Light:

One of the most common symptoms of a failing DPFE (Differential Pressure Feedback EGR) sensor is the illumination of the check engine light.

This sensor monitors the vehicle’s exhaust gas recirculation (EGR) system.

When the DPFE sensor malfunctions or detects irregularities in its operation or output, the vehicle’s computer will trigger the check engine light to alert the driver of a potential issue.

It is an important indicator for diagnosing and addressing problems related to the EGR system, ensuring optimal engine performance and emissions control.

2. Poor Fuel Economy:

Aing Delta Pressure Feedback EGR (DPFE) sensor can significantly impact fuel economy.

This occurs because it disrupts the engine’s efficiency by inadequately regulating the flow of exhaust gases back into the combustion chamber.

The engine management system relies on precise sensor feedback to adjust the air-fuel mixture accurately.

Without this crucial input, fuel consumption increases, and overall efficiency diminishes.

DPFE Sensor

Consequently, it is crucial to promptly address any issues related to the DPFE sensor to optimize fuel economy and maintain optimal engine performance.

3. Engine Performance Issues:

The Differential Pressure Feedback EGR (DPFE) sensor maintains optimal engine performance by monitoring the exhaust gas recirculation (EGR) system.

When the engine accelerates, the DPFE sensor detects the pressure difference across the EGR valve, ensuring proper positioning and regulating the flow of recirculated exhaust gases.

A faulty DPFE sensor can disrupt this delicate balance, leading to hesitation or power loss as the engine struggles to maintain the proper air-fuel mixture.

Therefore, it is essential to promptly diagnose and replace a faulty DPFE sensor to ensure smooth and efficient engine operation.

4. Pinging Or Knocking Noise:

The DPFE (Differential Pressure Feedback EGR) sensor is vital in monitoring the precise amount of exhaust gases required for a smooth combustion process.

However, when this sensor malfunctions, it can lead to a disruptive symphony of pinging or knocking noises emanating from the engine.

These unwanted noises directly result from the improper combustion caused by the sensor providing incorrect data. Promptly addressing and resolving any issues with the DPFE sensor is of utmost importance.

Doing so can ensure optimal engine performance, prevent potential long-term damage, and maintain a pleasant driving experience.

5. Failed Emission Test:

A vehicle with a faulty DPFE (Differential Pressure Feedback EGR) sensor is highly likely to fail an emission test.

The DPFE sensor is crucial in the Exhaust Gas Recirculation (EGR) system, which controls the vehicle’s emission levels.

When the sensor malfunctions or fails, it can significantly increase the amount of harmful gases emitted, potentially causing environmental concerns and impacting air quality.

Therefore, ensuring proper functioning and maintenance of the DPFE sensor is vital to meet emission standards and promote a cleaner, greener environment.

Causes Of DPFE Sensor Malfunction

A DPFE (Differential Pressure Feedback EGR) sensor malfunctioning can result from several causes.

The most common culprit is often the substantial heat that the sensor is exposed to, which can lead to the sensor’s internal components failing over time.

Another common cause is moisture intrusion, which can damage the sensor’s electrical components and lead to inaccurate readings.

Furthermore, excessive carbon buildup can also interfere with the sensor’s ability to measure the exhaust pressure accurately.

Lastly, issues with the wiring or electrical connectors leading to the sensor can also lead to malfunction.

Regular inspection and maintenance can help prevent these issues, ensuring the DPFE sensor’s longevity and optimal performance.

Replacement Cost Of The DPFE Sensor

Replacing a DPFE sensor can be a cost-effective way to resolve various engine performance and emission issues.

The cost of a DPFE sensor replacement typically ranges from $60 to $150 for a standard vehicle, with variations depending on the make and model of the car.

Replacement Cost

This pricing includes the parts, typically costing between $30 and $80.

However, the lion’s share of the expense often goes towards labor, as the sensor’s location can make installation challenging and time-consuming.

Professional mechanic services usually charge between $25 and $75 per hour, meaning you might pay up to $70 for labor alone.

However, DIY enthusiasts with appropriate tools and experience may be able to reduce costs by undertaking the task themselves.

Replacing the DPFE sensor may seem costly upfront, but it can save you money in the long run by improving fuel efficiency and preventing engine damage.


The DPFE sensor is integral to a vehicle’s EGR system, controlling emissions and upholding air quality.

Failure or malfunctioning of this sensor could lead to increased harmful gas emissions and engine performance issues, making its maintenance paramount.

While replacing a DPFE sensor can vary considerably, primarily depending on the vehicle’s make and model and labor costs, it’s a worthwhile investment.

The upfront expenditures, ranging from $60 to $150, can result in long-term savings by boosting fuel efficiency and averting extensive engine damage.

Therefore, timely identification of potential symptoms and resolution of DPFE sensor issues is crucial for optimal vehicle performance and environmental stewardship.

Terrence Hines

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