Check Engine Light Due to Cam Sensor Interrupter Fault on Oldsmobile 98

The cam sensor interrupter (magnet) may become demagnetized and/or fall off of the camshaft gear causing the Check Engine Light (Service Engine Soon) light to illuminate. On higher mileage vehicles it would be advisable to replace the timing chain and gears if this problem were to occur as the timing cover must be removed to replace the interrupter.

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Average mileage: 141,144 (106,433–160,000)
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
10 people reported this problem
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the interrupter fell off.
1990 Oldsmobile 98 106,433 mi,
I bought the car this way.I will fix it myself soon!!!