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Buick LeSabre DTC 41

Q. Hello Vincent, Hope you can provide some guidance on the following situation: My Dad has a 1990 Buick LeSabre. He does not drive much, so it has been driven about 60,000 miles and has nearly always been in a garage at night, he is the original owner. He does have the recommended servicing completed.

Buick LeSabre DTC 41

In the last few months, the "Service Engine Light" turns on while he is driving. He has taken the car to the dealer from whom he purchased the car and now provides the maintenance. The computer analysis indicates failure code 41, a malfunction in the Camshaft Position Sensor (CPS) circuit. However, the mechanics tested the CPS circuit and can find no problem.

Do you have suggestions or recommendations as to what may be the problem and what to do to address the situation? A key concern is that the engine will fail while he's driving down the street and at 80 years of age he'll have a difficult time dealing with the situation, not to mention the safety hazard for himself and others. Looking forward to your insights.

Thanks for your input.
Regards,
Ben

A. I can't believe a dealer couldn't figure this out! Did they change the CPS? Maybe a loose connection at the sensor? Possibly wires rubbing on the block or some bracket somewhere? I think that a bad Crank Angle Sensor (CAS) may also cause this code. They had trouble with crank sensors on these. I would give the dealer another try or maybe a different Buick or even a GM dealer, Chevy, Oldsmobile or Pontiac.

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