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P0391 ?

Old Oct 6, 2014 | 07:49 PM
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Default P0391 ?

Working on a 98 1500 5.2 5speed and it runs erratic at idle and has a P0391 code ! Would it be a bad cam sensor or ecu ?
 
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Old Oct 6, 2014 | 09:07 PM
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P0391 Camshaft Pos Sens B Circ Range/Perf Bank2

Think I would just replace the cam sensor first. Its fairly inexpensive, and easy to change. It just hides under the distributor cap. (yeah, a fun spot to work in.....) Disconnect the battery, change the sensor, reconnect the battery, drive the truck. See if the problem is gone.
 
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