I have a 91 Delta 88 with a v6, front wheel drive, 145,000 miles. Recently the check engine light came on. A garage determined it was Code 41, cam sensor. The light comes on only after running for a while as if the engine needs to warm up before the light goes on. Additionally it goes on and off at first and then after it seems to get completely warm the light stays on. I replaced the cam sensor but the same problem persists. The cam sensor wires seem ok. Car seems to run fine with the light on--although I have not checked the gas mileage impact. Questions: What else could be causing the Code 41? What if I just ignor it as it does not seem at this point to be impacting the operation of the engine? Thanks