My Spirit R/T (the red one) routinely sets a code 43. It seems to happen after it sits and idles for a few minutes. The OTC scanner I have says it has to do with the "ignition interface". Anybody have any idea what that means?
I've tried swapping ignition coils, cam/crank sensors, stock/Aurora/Magnecor wires, many brands/heat ranges of spark plugs, stock SBECs, but it always comes back. It will set the CEL light but goes out after I turn the car off and restart. WTH??