All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
(19 products available)
Ready to Ship
The Differential Pressure Feedback Electronic (DPFE) EGR sensor is used in vehicles to measure the pressure difference across the exhaust gas recirculation (EGR) system. This lets the engine control unit (ECU) know how the EGR system is working. It has two ports that connect to the EGR cooler or EGR valve. One port senses the pressure going into the EGR system, while the other port senses the pressure coming out of the EGR system. The sensor uses a microchip to measure the voltage differences between the two ports. This voltage change indicates the pressure difference and tells how much air is flowing through the EGR system. The ECU can then adjust the EGR valve opening based on how the sensor reads to optimize emissions and engine performance.
Two-Port DPFE EGR Pressure Feedback Sensors
Three-Port DPFE EGR Pressure Feedback Sensors
Integrated DPFE EGR Pressure Feedback Sensors
Digital Output DPFE EGR Pressure Feedback Sensors
There are several types of DPFE EGR pressure feedback sensors. They include:
Two-Port DPFE EGR pressure feedback sensors. These sensors have two ports connected to the EGR system. The first port measures the pressure going into the EGR system, while the second port measures the pressure coming out of the EGR system. The difference in pressure between the two ports gives information about how the EGR system is working. These are the most common types of DPFE EGR pressure feedback sensors and are widely used in many vehicles.
Three-port DPFE EGR pressure feedback sensors. These sensors have three ports. The first port is used to measure the atmospheric reference pressure, while the second and third ports are connected to different locations in the EGR system. These additional ports allow for more precise pressure measurements and better monitoring of the EGR system's performance.
Integrated DPFE EGR pressure feedback sensors. These sensors combine the DPFE sensor with other functions, such as an EGR valve or a control module. This integration simplifies the sensor design, reduces the number of components needed, and improves the overall efficiency of the EGR system.
Digital Output DPFE EGR pressure feedback sensors. Traditionally, DPFE EGR pressure feedback sensors output an analog signal corresponding to the measured pressure difference. However, digital output sensors provide a digital signal, allowing for more accurate and faster data transmission to the engine control unit (ECU). This enables the ECU to make more precise adjustments to the EGR system, improving emissions control and overall engine performance.
The specifications of the DPFE sensors can differ depending on the brand and model. Here are some common specifications:
Operating Voltage
The DPFE EGR pressure feedback sensors work with different operating voltage levels. The most common choices are 5V, 12V, and 15V. A higher operating voltage level allows the sensor to deliver more accurate pressure readings.
Pressure Range
The pressure range of a DPFE EGR pressure feedback sensor indicates the lowest and highest pressure levels the sensor can measure. Most models have a pressure range of 0 to 30 psi (pounds per square inch). Some advanced sensors can measure pressures up to 50 psi. A wider pressure range allows the sensor to monitor changes in pressure more accurately.
Temperature Range
The temperature range shows the lowest and highest temperatures the sensor can withstand. The typical temperature range is between -40°F to 200°F (-40°C to 93°C). Some sensors can work at higher temperatures, such as 250°F (121°C). Sensors with higher temperature limits are more durable and can last longer.
Response Time
The response time is the duration it takes for a change in pressure to register on the sensor. A shorter response time means the sensor can detect pressure changes rapidly. The typical response time for a DPFE EGR pressure feedback sensor is between 5 to 10 milliseconds (ms).
Wiring Connections
DPFE EGR pressure feedback sensors have different wiring connections depending on the model. Some common wiring connections include 3-pin, 4-pin, and 5-pin connectors. The sensors also have different wiring configurations. For instance, some sensors have a voltage output signal, while others have a current output signal.
Like any other vehicle sensor, the DPFE EGR pressure feedback sensor requires regular maintenance to function properly. Here are some maintenance tips:
Inspect the Wiring Connections
Dealers and vehicle owners should regularly check the wiring connections of their DPFE sensors. Loose connections can interfere with the readings of the EGR pressure sensor. Additionally, moisture, corrosion, and dirt can damage the wiring connections, resulting in inaccurate signals.
Clean the Sensor Housing
Over time, the housing of the DPFE EGR pressure feedback sensor can accumulate dirt and dust. This debris can block the sensor's vents, affecting its performance. Therefore, car owners should periodically clean the housing using a soft cloth. It is also advisable to avoid using harsh chemicals or high-pressure cleaners when cleaning the housing.
Perform a Visual Inspection
Vehicle owners should regularly check the sensor to identify any signs of wear and tear. They should also look for any physical damage to the sensor housing. If there are any damaged components, they should replace or repair them immediately.
Check for DTCs
Dealers and vehicle owners should use an OBD-II scanner to check for any DTCs related to the EGR system. If the scanner detects any error codes, they should troubleshoot the problem and fix it accordingly.
Follow the Manufacturer's Recommendations
For optimal performance, vehicle owners should follow the manufacturer's instructions on how to maintain their DPFE EGR pressure feedback sensors. They should also adhere to other maintenance practices such as regular vehicle servicing.
Here are some factors to consider when choosing a DPFE EGR pressure feedback sensor:
Vehicle Compatibility
When selecting an EGR pressure sensor, it is important to consider the make, model, and year of the car. This is important because different vehicles have different sensors that are specifically designed to fit and function in a given vehicle. Choosing the right sensor for a vehicle ensures proper performance and prevents potential damage that may be caused by improper fitting.
Quality and Reliability
Quality and reliability are very important when selecting a DPFE EGR sensor. Choosing a sensor from a reputable manufacturer is important because they provide consistent performance and quality. The original equipment manufacturer (OEM) sensors are highly recommended because they offer quality and reliability, ensuring that the vehicle performs well and preventing potential damage to the car.
Wired Connection
The type of wired connection used by the DPFE EGR pressure feedback sensor is important. This is because different vehicles have different types of wired connections. It is important to choose a sensor with a wired connection that is compatible with the vehicle to prevent potential damage to the vehicle.
Mounting Options
When selecting a DPFE EGR pressure feedback sensor, it is important to consider the mounting options. Different vehicles have different mounting options, such as bolting or clips. It is important to choose a sensor with mounting options that are compatible with the vehicle to prevent potential damage to the vehicle.
Quality Control
Quality control is an important aspect to consider when selecting a DPFE EGR pressure feedback sensor. It is important to choose a sensor from a manufacturer that has a quality control process. This is important because it ensures that the sensor meets quality standards and prevents potential damage to the vehicle.
Cost
Cost is an important aspect to consider when selecting a DPFE EGR pressure feedback sensor. Different manufacturers offer different prices. It is important to choose a sensor from a manufacturer that offers quality at an affordable price.
DPFE sensors are easy to replace. Technically, any car owner or driver can do it themselves. However, it is advisable to have it done by a professional mechanic to avoid further damage to the car. Below are steps to help replace the DPFE EGR sensor.
Firstly, gather the necessary tools that will be needed for this process. This includes:
Once the tools are gathered, turn off the car and set the parking brake. This is to prevent the car from moving while doing the replacement. Locate the EGR valve and DPFE sensor, which is usually mounted on the EGR tube. Using a ratchet and socket, remove the bolts that hold the DPFE sensor in place. It might take some effort to loosen the bolts. Once the sensor is loose, carefully disconnect the vacuum lines attached to the old sensor. It is important to remember the original routing of the vacuum lines before disconnecting them. Take a close look or make a quick note of how they were connected. Now, remove the electrical connector by using a screwdriver or a wrench. The method of removal may vary depending on the car model.
After removing the electrical connector, take the new EGR pressure sensor and install it. Reconnect the vacuum lines and electrical connections, ensuring they are secure and properly seated. Once done, carefully tighten the bolts and secure the sensor in place. Remember to follow the previous notes taken earlier and return them to their original position. Once everything is done, start the car to ensure everything is working properly. Check for any unusual noises or warning lights on the dashboard. Once the user is satisfied, they can go ahead and take the car for a drive.
Q1: Does the EGR sensor have anything to do with the DPFE sensor?
A1: Yes, the EGR sensor is related to the DPFE sensor. The DPFE sensor is a differential pressure EGR sensor that measures the pressure difference across the EGR valve to indicate how much exhaust gas the valve is controlling.
Q2: Can I drive with a faulty EGR sensor?
A2: It is not recommended to drive with a faulty EGR sensor. While the car may run seemingly well for a time, the EGR sensor regulates the EGR system to reduce emissions and control engine performance. A malfunctioning sensor can lead to increased pollution, potential engine performance issues, and long-term damage to engine components. If there are no immediate symptoms, there may be underlying issues the EGR sensor is compensating for. The car may run fine initially, but a faulty EGR sensor can eventually cause erratic engine behavior, decreased power, rough idling, or other symptoms. Addressing the issue promptly is essential to avoid further damage and maintain optimal engine performance.
Q3: What causes EGR pressure feedback sensor problems?
A3: Several factors can cause problems with the EGR pressure feedback sensor. Sensor wear and tear over time can lead to inaccuracies in measurement. Exposure to high temperatures or harsh engine conditions can damage the sensor. Deposits from normal EGR operation can accumulate over time, affecting its performance. Electrical issues like loose connections, wiring damage, or corrosion can disrupt communication with the engine control unit. Faulty components in the EGR system, such as a malfunctioning EGR valve, can create pressure issues that the sensor cannot accurately detect. Other underlying problems in the engine's intake or exhaust systems can lead to variations in airflow and exhaust composition, impacting the sensor's readings.
Q4: What is the function of the EGR pressure sensor?
A4: The EGR pressure sensor measures the pressure difference across the EGR valve to indicate how much exhaust gas the valve is controlling. This feedback helps the engine control unit adjust the EGR valve's operation to optimize emissions reduction and engine performance.
