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1997 Dodge Dakota 3.9L V6 P0320 P1391 P1398 Fault Diagnosis: Cam or Crank Sensor?

Model: 1997 Dakota Fault Code: P0320 Posted: 2010-01-02 06:54

I recently purchased a 1997 Dodge Dakota with a 3.9L V6 engine and 4WD. When I inspected the vehicle, the Check Engine Light (CEL) was already on. After using O'Reilly's code reader, I retrieved three fault codes: P0320, P1391, and P1398. Based on these codes, the issue appears to be either the camshaft position sensor or the crankshaft position sensor. How can I determine which sensor is faulty if I plan to perform the repair myself? Any guidance on diagnostics or replacement recommendations would be greatly appreciated.

Related fault codes

P0320P1391P1398

Comments (2)

Anonymous 2010-01-02 16:43

In most cases, P0320, P1391, and P1398 point to a faulty crankshaft position sensor rather than the camshaft sensor. If you're planning to replace it yourself, ensure you use an original equipment (OE) sensor—aftermarket parts often have less accurate airgap measurements, which can disrupt signal transmission to the Powertrain Control Module (PCM). This is a common issue and worth noting when selecting replacement components.

Anonymous 2010-01-02 19:57

I bought this vehicle from a trusted local used car dealer. I'm now taking it to a GM dealership rather than a local Mopar shop, as I've noticed their technicians aren't consistently reliable. As an Assistant Manager at one of the top three auto parts stores in town, I know they source many components—including these sensors—from our store. The GM dealer will likely get the part from us or another supplier. It doesn’t matter if they reach out to a Mopar dealer—since I’m not paying for it, I'm fine with that. Personally, I suspect the crankshaft sensor is at fault, and this confirmation has been helpful. Thanks for the insight, Jeff. Chris