P0315 OBD II Trouble Code Crankshaft Position System Variation Not Learned

Symptoms of P0315 OBD II Trouble Code

  • Malfunction Indicator Lamp (MIL) on
  • Misfire / bucking or surging
  • Dies out, but may restart if the problem is inconsistent
  • May run fine, until it is restarted; then will not restart
  • Engine will crank over, but will not run

Common Causes of P0315 OBD II Trouble Code

  • Crankshaft position re-learn procedure not performed / improperly performed ? one of the more common causes
  • Worn timing components, to include the timing chain and timing gears, distributor or even the flex plate (the part that the starter uses to crank the engine over with) ? next most common, along with:
  • Faulty Crankshaft Position Sensor ? common failure point
  • Open in the power or ground circuit to the crankshaft position sensor
  • Open in the signal circuit between the crankshaft position sensor and the PCM
  • Failed PCM - rarely