Well working on my buddies 08 G5 2.2 and he started developing a miss that got worse then loss tach and stall out. The issue is getting worse and worse. We checked codes and got PO335 Crank Sensor A Circuit Malf. We replaced the sensor and worked great for about a week or two then started again. We pulled the harness and checked for correct voltage readings and had 5v on two wires and ground on the other which is fine. We figured we would try a new sensor and issues is still the same. Long starting, no tach reading, and low on power. I heard it could be a PCM issue. Really just want to get this car on the road again.

Thoughts?