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P0315 - Crankshaft Position System Variation Not Learned

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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,
Fiesta 1.0L,
Fiesta 1.6L GTDI,
Focus 2.0L GTDI,
Mustang 3.7L,
Mustang 5.0L,
Mustang 5.8L		 Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
All others GO to PINPOINT TEST HD: MISFIRE DETECTION MONITOR .
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