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How to test the rail pressure sensor on a Fiat Doblò

Model: Fiat Doblo MK 2, Doblo 2, 263 - Years: 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
Part: Checks and maintenance

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Video tutorial

In this video we can see how to test the rail pressure sensor on a Fiat Doblò: it is a very important measurement for the correct functioning of the entire system. And we can test it using a voltmeter.

We will set the measurement to DC Volts and connect the ground cable to the battery. The first test is done with the ignition on, but the engine off: we will put the probe in the terminal of the black and purple wire and wait for a stable reading of 0.2; the yellow wire should give a reading of 0.51, while the red and green wire should give a reading of 5. Now we start the engine, and when the idle has stabilized, we probe the black wire, where there should be a stable voltage of 9.4, while in the yellow wire of 1.14, while in the red wire the voltage should be at 5.


Posted on 1 October 2025 by ScegliAuto


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by ScegliAuto

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