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Codes 2A94 and 3100 This Morning

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I was cruising at about 50 in 4th gear this morning on my way to work when all of a sudden I get a reduced power warning. I check the code with my Cobb AP and 2A94 (Crankshaft sensor, signal missing) and 3100 popped up.

The car was stuck in gear and wouldn't change to D from M mode. I came to a light, cleared the code and the 2A94 went away but the 3100 remains. Car drove fine but I didn't try to get on it at all.

Any thoughts on what's causing these codes? First thing that comes to mind is the obvious which is a bad crankshaft sensor.

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