Cam sensor interrupter failure on Buick Riviera

Submitted by Vehicle Owner · May 29, 2025

Published by RepairPal

Problem overview

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.

4 people reported this problem

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Buick Riviera vehicles with this problem

3 model years affected

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