Testing the camshaft position sensor and/or diagnostic trouble code (DTC) P0341, on your 3.8L V6 equipped GM car or mini-van, is an easy test that can be done using only a multimeter. No scan tool is needed for this test! Now, since the cam sensor can not be tested with a simple resistance test (Ohms), the test I'm gonna' show you is a dynamic test done by cranking the engine by hand.
If you need to know if this camshaft position sensor test applies to your specific 3.8L GM vehicle, take a look at the ‘Applies To:’ box on the right and scroll with the ‘Next > >’ button to see all of the applications.
Here are the contents of this article at a quick glance:
You can find this tutorial in Spanish here: Cómo Probar: Sensor de la Posición del Árbol de Levas (GM 3.8L) (at: autotecnico-online.com).
The one symptom you're gonna' experience is the check engine light (CEL) shining nice and bright to let you know that there's a problem.
You'll also see one or several of the following symptoms when the cam sensor fails:
The one thing you need to keep in mind is that a cam sensor failure will not keep your car from starting.
Although it sucks that you're having a cam sensor issue with your 3.8L equipped vehicle, the cool thing is that you don't need any expensive tools to test it. You don't even need to use a scan tool.
Tools You'll Need:
If possible, I recommend having a helper to help you.
The camshaft position sensor, on your 3.8L V6 GM engine, is a three-wire Hall Effect Type sensor. So, for it to work, it's gonna' need an external power supply and a path to ground (for this power).
OK, as you may have already deduced, from the info above, the camshaft position sensor's wires do not connect directly to the fuel injection computer. Instead, they run directly to the ignition control module (ICM) and the ICM then sends the cam signal to the PCM on circuit F (of the ignition control module's connector).
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Charles M. Schulz