P0315 2015 Chevrolet Silverado Code - Crankshaft Position System Variation Not Learned
Quick Answer
The Crankshaft Position (CKP) system variation learns feature is used to calculate reference period errors caused by slight tolerance variations in the crankshaft, and the CKP sensor. Common causes include Crankshaft Position (CKP) system variation learning, Faulty Crankshaft Position, Crankshaft Position sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0315 2015 Chevrolet Silverado indicates Crankshaft Position System Variation Not Learned.
- Common causes
- Common causes include Crankshaft Position (CKP) system variation learning, Faulty Crankshaft Position, Crankshaft Position sensor harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0315 2015 Chevrolet Silverado Description
The CKP system variation compensating values are stored in ECM memory after a learning procedure has been performed and the ignition switch is turned to the OFF position for at least 30 seconds. If the actual CKP variation is not within the CKP system variation compensating values stored in the ECM, DTC P0300 may be set.
If the CKP system variation values are not stored in the ECM memory or a proper ECM power-down does not occur after completing the CKP Learn Procedure, DTC P0315 sets.
What are the Possible Causes of the DTC P0315 2015 Chevrolet Silverado?
- Crankshaft Position (CKP) system variation learning
- Faulty Crankshaft Position
- Crankshaft Position sensor harness is open or shorted
- Crankshaft Position sensor circuit poor electrical connection
How to Fix the DTC P0315 2015 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
1. Turn off all the accessories. With the Air temperature sensor and Coolant temperature within 5 degrees (Centigrade) of each other, start the engine and let it idle in Park or Neutral for two minutes.
2. Accelerate the vehicle to 55 mph at part throttle. Cruise at 55 mph for 8- 10 minutes until the engine reaches operating temperature.
3. Cruise at 55 mph for another 5-6 minutes.
4. Decelerate to 45 mph without braking and maintain 45 mph for 1 minute.
5. Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary. Returning to 45 mph for 15 seconds in between deceleration cycles.
6. Accelerate to 55 mph and cruise for 2 minutes.
7. Stop the vehicle and idle for 2 minutes with the brake applied and the transmission in Drive (automatic trans.) or Neutral (manual trans.) with the clutch depressed.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0315 2015 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0315 2015 Chevrolet Silverado Code
1. What does the OBDII code P0315 mean on a 2015 Chevrolet Silverado?
P0315 indicates that the Crankshaft Position System Variation has not been learned by the vehicle's engine control module (ECM).
2. What are the common symptoms of code P0315 on a 2015 Chevrolet Silverado?
Symptoms may include the check engine light being illuminated, rough idling, poor acceleration, and potential misfire issues.
3. What causes code P0315 to appear on a 2015 Chevrolet Silverado?
Common causes include a recent battery disconnection, a failed crankshaft position sensor, a damaged reluctor wheel, or improper reprogramming of the ECM.
4. Can I drive my 2015 Chevrolet Silverado with code P0315?
While the vehicle may still be drivable, it could experience performance issues like rough idling or misfires, and ignoring the code may lead to more severe engine problems over time.
5. How is code P0315 diagnosed on a 2015 Chevrolet Silverado?
A technician will use a scan tool to confirm the code, inspect the crankshaft position sensor, check the reluctor wheel for damage, and verify if a crankshaft position variation relearn procedure is needed.
6. How do I fix code P0315 on a 2015 Chevrolet Silverado?
Performing a crankshaft position variation relearn procedure using a scan tool typically resolves the issue. If the sensor or reluctor wheel is damaged, they will need to be replaced.
7. What is a crankshaft position variation relearn procedure?
It is a process carried out using a scan tool to recalibrate the ECM to recognize the crankshaft position sensor's signal after repairs or changes to the engine system.
8. Can a dead or disconnected battery cause code P0315?
Yes, a dead or recently disconnected battery can reset the ECM and erase the crankshaft variation memory, triggering the code.
9. Is a faulty crankshaft position sensor a common reason for code P0315?
While not the only cause, a faulty crankshaft position sensor is a common reason for this code and should be tested during diagnosis.
10. What tools are needed to clear code P0315 on a 2015 Chevrolet Silverado?
A professional-grade scan tool capable of performing the crankshaft position variation relearn procedure is required to clear the code properly.
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