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Discussion Starter · #1 ·
I've searched the forum and didn't find the exact answers to my question, so thought I should ask.

I suspect my CPS may be faulty and upon searching for how to test the sensor I see multiple posts saying to check the resistance, which should be about 980 ohms. When I do this test, it reads almost exactly 980, but that's when the engine is cold. When the engine has warmed up it reads 1190 ohms.

I'm wondering at what engine temp should I be checking this sensor because heat is clearly a factor. Or is it supposed to be 980 ohms regardless of the engine temp?
 

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Resistance measurements are always done at room temperature. The only real way to check them is with an osciliscope and looking at the waveform the produce.
 
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