Question about 2001 Chevrolet Tahoe

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Water Pump replacement and then PO332 code ~ knock sensor

2001 Chevy Tahoe, 2WD, 5.3L engine. 176k miles

I replaced my water pump a few weeks ago. After I did so, my check engine light comes on. PO332 ~ Know sensor low voltage... I have replaced my wires and plugs. I have added some additives to the gas and still nothing. Not only did this code come up but for the last few days, when I take off from a dead stop and push the gas, the RPM goes up but the transmission does not engage unless I release the gas and then it engages. Please help

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  • yadayada
    yadayada May 11, 2010

    has the trans ever had the fluid and filter changed? is the fuid level low?

  • Jaylon Sep 12, 2014

    yes it has and the trans was replaced. Since then, I bought a hummer and guess what, having it only 2 years, the trans had to be replaced.... WOW, starting to wonder about GMC/Chev



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Sounds like you have several problems. The P0332 sounds like you got your knock sensor wet and needs to be replaced. When you do make sure you replace the wire harness also and that you seal around both sensors. Also remove the back near fire wall foam under the intake mani to let the water that collects evap out.

Posted on Feb 19, 2010


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