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International Automotive Technicians Network
Re: The P1391 Intermittent Loss of CKP/CMP
Posted to Technical Theory Forum on 12/3/2018

Thanks for your suggestions/comments.

I know that on INDUCTIVE sensors like the older Volvos'CKP starter high amps and slow response could effect the alternating current wave signal negatively (make it seem wrong to computer).

This Jeep has a Hall type sen... Login to read more.