A differential pressure sensor is an electronic sensor that measures back pressure before and after the DPF and determines the level of soot contained within the dpf.
Blowdown phase when exhaust valve opens towards the end of power stroke 60 — 40o BBDC cylinder pressure is about 0. Abstract: Exhaust system components such as mufflers and exhaust aftertreatment devices are a source of engine exhaust back pressure. Increased back pressure levels can cause increased emissions, increased fuel consumption, and can negatively affect engine performance.
Skip to content Lifehacks. April 24, Joe Ford. Table of Contents. June 11, Joe Ford. So before replacing your engine parts, try Carbon Cleaning. A dirty engine as the result of carbon deposits is the new threat to vehicle performance. Learn more about the functioning of the DPFE sensor.
In order to lower the amount of nitrogen oxide coming out the exhaust, the federal government mandated the addition of Exhaust Gas Recirculation EGR Systems as part of the modification of the Clean Air Act.
Nitrogen oxide is produced under high temperatures and pressure. By recirculating inert they won't burn emissions back into the combustion chamber, ignition temperatures are lowered and less nitrogen oxide is produced by the combustion process. If your vehicle is a model or newer, it has a EGR. However, the DPFE sensors that come standard with a vehicle have a tendency to fail quickly.
Trying to compensate, the PCM opens up the actuator too much. 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.
The DPFE sensor in the Focus is not very robust, requiring frequent every 30k miles or sometimes less replacement or a work around. If you're experiencing stumble or hesitation while cruising, and think that it might be related to DPFE sensor failure. If the stumble goes away, then your DPFE sensor is more than likely failing. Of course, replacement of the bad DPFE sensor is the official recommended fix for this problem.
However, a while longer to perform but makes for a nice semi-permanent solution that won't cause any damage or check engine light warnings if the DPFE Sensor hasn't completely died. In this case, the fault is related to a malfunctioning EGR pressure sensor signal. In fact, this light comes on whenever there is a problem with the motor. This valve is found behind the upper intake manifold , which is between the motor and the firewall. The DPFE sensor is often shaped like a small square.
You will see two vacuum hoses attached to the bottom and there is a wiring harness coming from its side. However, the exact location can vary based on what model vehicle you drive. However, replacing the DPFE sensor is a simple task that can be done with a few everyday tools. Leaving the car with a faulty EGR system only causes trouble passing emissions tests and leads to further air pollution.
Ask any car question in our new community! Magnus is the owner and main author of MechanicBase. He has been working as a mechanic for over 10 years, and the majority of them specialized in advanced diagnostics and troubleshooting.
Certified Automotive Diagnostic Technician. Just replaced the engine in an 07 Ford escape, and came back with a DPFE code after 30 miles on the road. Could correlation stem from causation in this case?
I have a Isuzu rodeo 3. More than likely your egr valve is getting clogged. There is a gasket that also has a screen built in it. Try one that should fix your problem. I need a dpf pressure senor. Oil switch and a mass air meter for vauxhall zafari 1. Hello Magnus.
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