P0315 - Crankshaft Position System Variation Not Learned

The crankshaft variation relearn data has not been completed or is no longer valid.

Treat the code as the starting point: compare symptoms, likely causes, and repair paths before pricing parts or moving into an estimate.

Code Overview

The crankshaft variation relearn data has not been completed or is no longer valid.

Common Causes

• Battery disconnected or PCM reset
• Crankshaft relearn not performed
• Crank sensor or reluctor issue

Diagnostic Steps

1. Check whether a crank variation relearn is required
2. Inspect for crank sensor faults
3. Confirm no related timing or misfire faults are active

Likely Repairs & Cost Guides

Use symptoms, scan data, and quick checks to confirm the likely repair path before pricing parts. The estimator helps compare repair paths before replacing anything unnecessarily.

Related OBD Codes

Browse nearby code-family pages when the same fault pattern overlaps across systems, such as misfire, lean fuel trim, EVAP sealing, cooling, or charging faults.

Next Steps

Move from code lookup to diagnosis, then estimate the likely repair only after symptoms, causes, and checks point to the same path.