DTC P0315: Crankshaft Position System Variation Not Learned

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2013 Lincoln Navigator, 2013 Lincoln MKZ, 2013 Lincoln MKX, 2013 Lincoln MKT, and 2013 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0315: CRANKSHAFT POSITION SYSTEM VARIATION NOT LEARNED

For Neutral Profile Correction Using Scan Tool
Description:	The PCM has not learned the crankshaft pulse wheel tooth spacing. This DTC disables the misfire monitor.
Possible Causes:	PCM replacement Internal PCM non-volatile random access memory (NVRAM) error
Diagnostic Aids:	Complete the Misfire Monitor Neutral Profile Correction procedure using the scan tool.
For All Others
Description:	The PCM is unable to learn and correct for mechanical inaccuracies in crankshaft pulse wheel tooth spacing. This DTC disables the misfire monitor.
Possible Causes:	Damaged crankshaft pulse wheel teeth Damaged crankshaft position (CKP) sensor
Diagnostic Aids:	Requires visual inspection of the CKP sensor and the crankshaft pulse wheel teeth for damage.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
F-150 5.0L, Mustang 5.0L, Focus 2.0L GTDI	Refer to the appropriate Description article, Possible Causes and Diagnostic Aids for the DTC.
All others	GO to PINPOINT TEST HD .