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Re: 2003 deville
A faulty crankshaft position sensor is a common problem with this car. The error code does not distinguish between the upper and the lower sensor so I recommend you replace them both. Put the front end of the vehicle on jack stands and remove the oil filter bracket. Then you should have decent access to both sensors.
A faulty crankshaft position sensor will cause the engine to stop running
intermittently.
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