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Cam sensor interrupter failure on Buick Riviera

Problem Description and Possible Solution

The camshaft position sensor interrupter (magnet) on the camshaft sprocket may fall off causing the check engine (SES) to illuminate. If this fault occurs on high mileage vehicles our technicians recommend to also replace the timing chain at the same time.

Problem Data
RepairPal Verified
Average mileage: (–)
3 model years affected: 1991, 1992, 1993
4 people reported this problem