See full version: How to Test a Temperature Sensor with a Multimeter
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This article has been viewed 26,281 times. [links]
This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards.
There are 7 references cited in this article, which can be found at the bottom of the page. more
This article has been viewed 26,281 times. [links]
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Disconnect the two vacuum hoses from the sensor by giving them a firm tug. more
The Differential Pressure Feedback Exhaust Sensor, or DPFE sensor, is part of the vehicle's exhaust gas recirculation (EGR) system. The sensor monitors and measures the pressure with the EGR valve. This prevents the valve from malfunctioning and allowing too much exhaust into the intake manifold at one time. If a vehicle's running poorly or having poor gas mileage, the DPFE sensor may be to blame.
Connect the negative (black) multimeter lead to a ground point, such as the negative battery terminal. Clip the positive (red) lead to the DPFE sensor signal wire. The sensor has three wires; the signal wire is the first wire on the left of the unit.
Open the hood of the vehicle. Locate the DPFE sensor, which is near the EGR valve, behind the upper intake manifold, between the firewall and engine. The sensor is a small square with two vacuum hoses on the bottom and a wire harness coming out from the side. The location will vary slightly from make and model. Check your repair manual for exact location and a detailed diagram.