Question about 1989 Buick LeSabre

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How to replace the magnet for the cam sensor - 1989 Buick LeSabre

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I worked on Buick's for 18 years and this was a bad design. unfortunately the magnet snaps in from the back side of the cam gear their is no cheating this one. My experiences with these was that by the time the plastic retainer on the magnet got brittle enough to cause problems with the magnet the timing chain was worn out any way, so if is worth fixing just replace the timing chain and gears and your magnet Good Luck

Posted on Oct 01, 2010


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What is trouble code 41 for 1988 olds 98???

It indicates a problem with the cam sensor. The problem could be a defective cam sensor or it could also be the magnet attached to the cam gear that the sensor detects. They have a history of falling off after many heating and cooling cycles. If the magnet (about the size of a dime) is missing, replacing the cam sensor won't help. The magnet will need to be replaced.

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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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1 Answer

I have a 91 olds Ninety eight regency elite Intermittently dies code 41 comes up cam sensor circut replaced cam sensor still dies could it be the crank sensor? thank you Michael Dale

cam sensor is only half of the cam circuit, the other half of the cam circuit is the magnet on the timing chain. the cam sensor reads from the magnet every time the engine completes a revolution,
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1 Answer

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41 is cam sensor code. are you sure the magnet is still in the cam gear? use only quality parts. if the magnet is missing, you need to replace the timing gears/chain.

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There is a magnet that the sensors need to pass over. Sometimes they crack and fall down . Remove the sensor and slowly turn the motor over till you see it. If you replaced the belt its possible the magnet is dirty or even damaged if the belt broke before replacing.
If you hook the meter to the signal wire you should see a frequency pulse. But this can be inconclusive if the siganl is weak or erratic.

Jul 27, 2009 | 1998 Hyundai Elantra

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