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I am experiencing a P0336 code on my 2008 Corvette, signifying a crankshaft position sensor malfunction. This results in the RPM gauge displaying zero. Initially intermittent, the issue has become persistent. Over several months, I have conducted extensive troubleshooting, including multiple crank sensor replacements, wiring harness inspection, fuse box and ECU replacement, engine removal to inspect the crank reluctor wheel and timing components, verification of 5V reference signals, and cleaning of engine and chassis grounds. Live data from my scan tool indicates normal crank sensor RPM readings, yet the issue persists. Any information or advice would be greatly appreciated.
First question is where did you buy your sensors from ??…if Amazon or EBay that’s probably your problem…if your harness inspection was only visual that’s not good enough…you should do a “wiggle test” of as much of the harness as you can…also a terminal tension test to make sure you don’t have an intermittent condition which sounds like what you have….a lab scope is what I use to test these sensors and with it I can see if any reference pulses are missing (60- 2 teeth) or if every pulse is not at 5 volts or fully get pulled to ground…this is the gold standard in checking this sensor…below is the code setting criteria for the P0336 and my crank and cam sensor waveform on my 2008…you should also do a “crankshaft variation lean” so the ECM can accurately detect misfires since the CKP sensor is the ECM’s misfire “monitor”.
Help needed, P0336 code
