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Re: The P1391 Intermittent Loss of CKP/CMP
Posted to Technical Theory Forum on 12/2/2018

Calling the starter based on the oscilloscope data. Complaint was P1391 CKP/CMP missing intermittently. We noticed some starter perturbations but car seemed to crank sufficiently.

The original quest was to find CKP/CMP missing signals and thus solve P1391. J... Login to read more.