Bought a 2012 crew awd with 130,000 miles. 2 days after cel code p0325 showed up. Knock sensor 1 circuit malfunction ( bank 1 or single circuit). I replaced both knock sensors and still get code. 2 mechanics and 4 knock sensors later still have code. When you clear code truck will run without code till you shut off and restart then code shows up and runs with no power. Cannot hear any engine knocking. Any help would be appreciated.