Identifying DPFE Sensor Failure Symptoms: A Guide to Understanding the Signs

A DPFE (Delta Pressure Feedback EGR) Sensor is an electronic device that measures the amount of exhaust gas recirculation (EGR) in an engine. It provides feedback to the engine control module so that the EGR system can be adjusted accordingly. A failure of the DPFE Sensor can result in a variety of symptoms, including poor fuel economy, poor engine performance, and excessive emissions. Additionally, a check engine light may appear on the dashboard if the sensor fails. Diagnosis of this issue can be done using a scan tool and should include checking for codes related to the DPFE Sensor. Repair usually involves replacing the sensor and resetting any fault codes.

Automobile: DPFE Sensor Failure Symptoms


A DPFE Sensor, or Differential Pressure Feedback EGR, is a type of automobile exhaust gas recirculation (EGR) valve. It is designed to measure the flow rate of exhaust gas and provide feedback to the engine control computer. This helps the computer determine how much fuel to inject into the engine for optimum performance.


The DPFE Sensor is typically located in the engine compartment, near the exhaust manifold and close to the EGR valve. It can also be found on other parts of the vehicle, depending on its make and model.

Role in Automobile

The DPFE Sensor plays an important role in controlling emissions from a vehicle’s engine. The sensor measures the pressure difference between two points in the exhaust system, allowing it to regulate how much fuel is injected into the cylinders. This helps keep emissions within acceptable levels and ensures that your vehicle runs efficiently.

Common Symptoms of a Failed DPFE Sensor

When a vehicle’s DPFE Sensor fails, it can lead to several symptoms that may indicate an issue with this component. These include:

  • Engine Stalling or Misfiring: A failed DPFE Sensor can lead to difficulty starting up or maintaining idle speed. Additionally, your car may experience misfiring or stalling when accelerating.
  • Reduced Fuel Economy: If your car’s DPFE Sensor has failed, it can cause your fuel economy to decrease significantly as more fuel is being injected than necessary.

DPFE Sensor Failure Symptoms

The DPFE sensor, or Differential Pressure Feedback EGR, is a part of the exhaust gas recirculation (EGR) system that is found in many modern vehicles. This sensor is responsible for monitoring the pressure difference between the exhaust manifold and the intake manifold and sending a signal to the engine management system. When this sensor fails, it can cause a variety of symptoms that can affect the overall performance of your vehicle.

Poor Acceleration Performance

One of the most common symptoms of DPFE sensor failure is poor acceleration performance. When the DPFE sensor fails, it can cause a disruption in communication between the engine management computer and other components in the system, causing your car to lose power and become unresponsive when you press on the accelerator. This can be especially dangerous when you are trying to merge or pass on busy highways.

Check Engine Light Illumination

Another symptom that could indicate a failing DPFE sensor is an illuminated check engine light on your dashboard. While this could be caused by other underlying issues, it’s always best to have your vehicle diagnosed by a professional mechanic when this occurs. The mechanic will be able to determine if it is indeed caused by a faulty DPFE sensor or something else entirely.

High Emission Levels

Finally, high levels of emissions are another symptom associated with faulty DPFE sensors. When these sensors fail, they can cause more exhaust gases than normal to enter into your vehicle’s intake manifold, resulting in higher levels of emissions being released into the environment. If you notice an increase in emissions coming from your vehicle’s tailpipe, then you should have it looked at right away as this could have serious environmental consequences if left unresolved for too long.

Causes Of DPFE Sensor Failure

There are several potential causes for DPFE sensor failure that should be taken into consideration before attempting any repairs on your own vehicle. One of these causes includes heat damage from excessive temperatures within the exhaust system which can cause damage or burn out components within the system including the DPFE sensor itself. Additionally, contamination from oil or grease buildup within the system could also lead to damage over time which would need to be addressed as soon as possible in order to prevent further issues from occurring down the line.

FAQ & Answers

Q: What is a DPFE Sensor?
A: A Differential Pressure Feedback EGR (DPFE) sensor is an automobile part that detects the amount of exhaust gases in the vehicle’s intake manifold. It is used to monitor the efficiency of the Exhaust Gas Recirculation (EGR) system.

Q: Where is the DPFE Sensor Located?
A: The location of a DPFE sensor depends on the make and model of a vehicle, however, it is typically found on or near the EGR valve, somewhere along the exhaust system.

Q: What are Common Symptoms of a Failed DPFE Sensor?
A: Common symptoms of a failed DPFE sensor include engine stalling or misfiring, reduced fuel economy, poor acceleration performance, check engine light illumination, and high emission levels.

Q: What Causes DPFE Sensor Failure?
A: The most common causes of DPFE sensor failure are heat damage from an exhaust system and contamination from oil or grease buildup.

Q: How Can You Avoid DPFE Sensor Failure?
A: To avoid DPFE sensor failure you should ensure regular maintenance checks to detect any signs of wear and tear or contamination. Additionally, you should have your car inspected for any leaks in your exhaust system as this can be a major factor in causing heat damage to your DPFE sensor.

In conclusion, DFPE sensor failure symptoms can be difficult to diagnose and often lead to costly repairs. The most common symptoms include a check engine light, poor fuel economy, and loss of power. Other more serious symptoms involve stalling or rough idling. To prevent costly repairs, it is important for drivers to be aware of the signs of DFPE sensor failure and take appropriate action if any of these symptoms are present.

Author Profile

Carl Frisch
Carl Frisch
With more than 30 years in the bicycle industry, I have a strong background in bicycle retailing, sales, marketing and customer service. I have a passion for cycling and a dedication to excellence. As a manager, I worked diligently to increase my capabilities and responsibilities, managing up to eleven mechanics (at Palo Alto Bicycles) and later as a working partner in my own store.

As the shop owner of Spoke n’ Word Cycles in Socorro, NM, the success of the mission was my responsibility, which I pursued passionately since we opened in 2003 through the spring of 2011. I am adept at managing owned and loan inventory, preparing weekly & annual inventory statements, and managing staff. The role as managing partner also allowed me tremendous freedom. I used this personal freedom to become more deeply involved in my own advancement as a mechanic, to spearhead local trail building, and advocating for cycling both locally and regionally.

As a mechanic, I have several years doing neutral support, experience as a team mechanic, and experience supporting local rides, races, club events. I consistently strive to ensure that bicycles function flawlessly by foreseeing issues and working with the riders, soigners, coaches and other mechanics. Even with decades of experience as a shop mechanic and team mechanic, and continue to pursue greater involvement in this sport as a US Pro Mechanic, and UCI Pro Mechanic.

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