The DPFE Sensor provides information to the Powertrain Control Module (PCM) to tell it how much exhaust gas is flowing through the system. The PCM uses this information to control the EGR Valve and other factors to optimize engine performance and emissions.
How do you test a bad DPFE sensor?
- Open the hood of the vehicle. …
- Disconnect the two vacuum hoses from the sensor by giving them a firm tug.
- Turn the ignition key to the “On” position. …
- Connect the negative (black) multimeter lead to a ground point, such as the negative battery terminal.
What happens when a DPFE sensor goes bad?
When a DPFE sensor begins to fail, it provides the PCM with bad/inaccurate data. This is because it is less sensitive and the PCM thinks less recirculated gas is being burned than is actually so.
What are the symptoms of a bad EGR pressure sensor?
- Your engine has a rough idle. …
- Your car has poor performance. …
- You have increased fuel consumption. …
- Your car frequently stalls when idling. …
- You can smell fuel. …
- Your engine management light stays on.
Can a bad DPFE sensor cause misfire?
When the DPFE Sensor starts failing, it gives the PCM bad information. … This excessive amount of EGR combined with the air coming in via the throttle body leans out the fuel mixture, causing a lean misfire, which is the “stumble” or “hesitation” that is common as the DPFE Sensor fails.
How do you test a DPF pressure sensor?
If everything passes physical inspection, you can test the DPF differential pressure sensor using a multimeter set to 20V and a pressure gauge. With the battery on and engine off, connect the multimeter ground to the negative battery terminal and run a quick plausibility by checking the voltage of the battery.
What does DPFE sensor do?
o DPFE (Differential Pressure Feedback Electronic) Sensors are an integral part of the EGR (Exhaust Gas Recirculation) System. The DPFE Sensor provides information to the Powertrain Control Module (PCM) to tell it how much exhaust gas is flowing through the system.
What does the EGR pressure sensor do?
The EGR Position sensor detects the movement and position of the EGR valve pintle. The EGR Pressure sensor detects exhaust gas flow through the EGR passage.
Can I drive with a bad EGR valve?
Can I drive with a bad EGR valve? Technically, you can drive your vehicle with a bad EGR valve, but your vehicle will run rough, shake at idle, and a check engine light will be illuminated. You might also hear popping sounds while driving down the road.
What happens if you unplug EGR valve?
If you unplug it, while the truck is off, then the EGR will stay closed. If the EGR valve is clogged or completely blocked off it can longer re-burn harmful emissions in the combustion chamber. You’re now sending the exhaust gas away from the engine when using an EGR delete kit, which means it begins to run cleaner.
How much does it cost to fix EGR valve?
The average cost of replacing the EGR valve in your vehicle is anywhere from $250 to $350 on average, depending on your vehicle’s year, make, and model as well as the type of system it has. The cost of parts will be somewhere around $190 to $270, while the cost of labor will be anywhere from $60 to $80.
How do you change a DPFE sensor?
- Remove the rubber hoses from the bottom of the DPFE sensor. The sensor is located on the firewall to the rear of the EGR valve. …
- Remove the electrical connector from the sensor. …
- Bolt the new sensor to the firewall. …
- Clear the codes to reset the “Check engine” light.
Where is the EGR pressure sensor located?
Where are these sensors located? Mechanical EGR valve position sensors are mounted on the top of the EGR valve. EGR pressure sensors will be located close to the EGR valve as the exhaust gas hose must be connected to the sensor as well as the valve.
What does P1401 code mean?
Error Code P1401 is defined as DPFE (Differential Pressure Feedback Sensor) Error. This error code is a manufacturer-specific trouble code, meaning it does not apply to all vehicles makes. Rather, it applies only to specific vehicle makes, such as Ford and Hyundai.
How do you know if your DPF is clogged?
- You feel a loss of power in your engine (limp mode).
- The DPF light will appear on your dashboard.
- Passive and active regeneration keep failing.
- A pungent smell of diesel.
- Automatic Stop-Start System Not Working.
- Your car seems to be releasing an excessive amount of smoke.