Check engine light is back on. It has been coming on intermittently last year or so, but now it's on solid. Had the codes read yesterday - P0330. What the heck?! I changed both of these and the harness 3.5 years/40k miles ago. When I changed them the first time, both tested Ok, which always raised my curiosity of whether they were actually the problem.
Four situations IMO:
1. The engine is really knocking. Sensors are doing their job and something else is wrong like timing or?... I never hear anything in fact I'm always impressed how smooth she runs with 150k
2. Wiring from sensor harness to main ECM isn't right. Bad ground, bad signal etc.. Guess I could jump all of it If I knew the pin sequence.
3. Bad ECM. Anyone have a loaner?
4. Bad knock sensors. Highly doubt it since they are relatively new and the ones I removed tested Ok.
Gotta get the fixed once and for all. Emission won't pass and as we know, this code shuts down the transmission overdrive