1991 olds 98.3800 motor. Where is the cam sensor?
it is located on the timing cover at the top. there is a plug connected to the sensor, its usually a 90 degree connector. there is also a magnet that is attached to the cam gear that sometime breaks off causing a cam sensor code to be set. with the cam sensor out using a mirror look into the hole and turn the engine over checking to see if the magnet is still fastened to the cam gear. the only way to replace this magnet is to replace the cam gear. in which case replace the timing gears and chain at the same time. the timing cover must come off.
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