P0315 on 2001-2006 Chevrolet Silverado 2500HD — Crankshaft Position System Variation Not Learned
1 vehicles · 1 makes · $150-$500 repair
Most Reported On
P0315 is an OBD-II diagnostic trouble code meaning “Crankshaft Position System Variation Not Learned.” The crankshaft position variation (relearn) procedure has not been completed, so the ECM/PCM lacks the reference data it needs to accurately run the misfire monitor. Each crankshaft reluctor wheel has small tooth-spacing variations; the controller must 'learn' these to tell a real misfire from normal mechanical variation. Commonly appears after an ECM replacement/reflash or crankshaft sensor/engine work. This code is most commonly reported on 2001-2006 Chevrolet Silverado 2500HD, with repair costs ranging from $150 to $500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0315.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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FAQ
What does P0315 mean?
P0315 stands for "Crankshaft Position System Variation Not Learned." The crankshaft position variation (relearn) procedure has not been completed, so the ECM/PCM lacks the reference data it needs to accurately run the misfire monitor. Each crankshaft reluctor wheel has small tooth-spacing variations; the controller must 'learn' these to tell a real misfire from normal mechanical variation. Commonly appears after an ECM replacement/reflash or crankshaft sensor/engine work.
What are the most common causes of P0315?
The most common causes of P0315 are: Crankshaft variation relearn not performed after ECM/PCM replacement or reflash, Crankshaft position sensor replaced without relearn, Damaged crankshaft reluctor/tone ring, Faulty crankshaft position sensor, Low battery voltage interrupting the relearn. The specific cause varies by vehicle.
How much does it cost to fix P0315?
Repair costs for P0315 range from $150 to $500, depending on the vehicle and root cause.
Which vehicles are affected by P0315?
Au7o has documented P0315 across 1 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.