P0315 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0315 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0315 code.

What Does P0315 Code Mean?

OBD-II Code P0315 is defined as a Crankshaft Position System Variation not Learned

The Crankshaft Position Sensor measures the exact rotational speed and position of the crankshaft. This provides a critical data signal used by the engine control module (PCM) to control Ignition Spark Timing and Fuel Delivery. On some vehicles the crankshaft position must be relearned by the control module by manually going through the appropriate procedure when the crankshaft sensor is replaced or the battery is disconnected. Failure to properly complete the relearn procedure will set code P0315.

P0315 Symptoms

• Engine may not start

Common Problems That Trigger the P0315 Code

• Camshaft Position Sensor (CMP) failure
• Crank/camshaft signal is out of calibration
• Crankshaft Position Sensor (CKP) failure