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1999 Dodge RAM 1500 5.9L with engine code P1391. What causes this code?

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1999 Dodge RAM 1500 5.9L with engine code P1391. What causes this code?

Vehicle: 1999 Dodge RAM 1500 5.9L

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The code means that either the Crankshaft Position Sensor or the Camshaft Position Sensor are not sending the correct signal. The Camshaft Position Sensor is the most frequent problem.

P1391 DODGE - CMP or CKP Signal Intermittent Condition
Read more: https://www.autocodes.com/p1391_dodge.html

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