OBD-II code · Powertrain (generic)
P0315 Crankshaft Position System Variation Not Learned
The PCM has not yet learned the crankshaft position variation table required for accurate misfire detection. After flywheel/sensor replacement or PCM relearn, a procedure must be performed (typically deceleration from a defined RPM with closed throttle).
Is it safe to drive with P0315?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRelearn procedure not yet performed
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1 h
- Emissions test
- Likely to fail
- Parts involved
- Crankshaft Position Sensor, Flywheel, Powertrain Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.