Recently had my 60K factory maintenance check on my 02 4x4 5sp SC X and asked them to investigate why my engine power seemed so poor lately...

They said that the supercharger relies on a knock/detonation sensor, and that mine was blown. The supercharger apparently shuts down when it doesn't receive a signal from the sensor. The sensor itself is $180, but it's buried deep in the engine. They have to remove the exhaust manifold to get to the sensor, which is a lot of labor. Total cost including parts and labor - $800. They also suggested that continuing to drive it without repairing it could damage the engine.

Would appreciate anyone's comment on this, including their diagnosis, the cost of repair, and the risk of possible engine damage if I defer doing the repair - truth or fiction?