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P0315 2015 Chevrolet Silverado Code - Crankshaft Position System Variation Not Learned

Quick Answer

The P0315 diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates that the Crankshaft Position System Variation is not learned. Common causes include Faulty crankshaft position sensor, Damaged wiring or connectors related to the sensor, Misaligned timing chain. 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 Faulty crankshaft position sensor, Damaged wiring or connectors related to the sensor, Misaligned timing chain.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0315 2015 Chevrolet Silverado Description

The P0315 diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates that the Crankshaft Position System Variation is not learned. This code typically points to an issue with the engine's ability to accurately determine the position of the crankshaft. The crankshaft position sensor plays a crucial role in providing the engine control module (ECM) with information about the crankshaft's position and speed, allowing for precise ignition timing and fuel delivery.

OBDII Code P0315 2015 Chevrolet Silverado - Crankshaft Position System Variation Not Learned
P0315 2015 Chevrolet Silverado Code - Crankshaft Position System Variation Not Learned

Common Causes of P0315 2015 Chevrolet Silverado

  1. Faulty crankshaft position sensor
  2. Damaged wiring or connectors related to the sensor
  3. Misaligned timing chain
  4. ECM software issues
  5. Mechanical engine problems affecting crankshaft position

Symptoms of P0315 2015 Chevrolet Silverado

  1. Rough idling or engine stalling
  2. Reduced engine performance
  3. Misfires or hesitation during acceleration
  4. Check Engine Light illuminated
  5. Increased fuel consumption

How to Fix P0315 2015 Chevrolet Silverado

  1. Diagnose the issue using a scan tool to verify the P0315 code and check for any related codes.
  2. Inspect the crankshaft position sensor, wiring, and connectors for any damage or corrosion. Replace as necessary.
  3. Check the timing chain alignment and adjust if needed.
  4. Perform a crankshaft position variation relearn procedure using a scan tool to reset the ECM's learned values.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0315 2015 Chevrolet Silverado

The cost of repairing a P0315 code on a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing a crankshaft position sensor can range from $50 to $200, while labor costs can add another $50 to $150. If additional repairs or adjustments are needed, such as timing chain alignment or ECM reprogramming, the total cost could increase accordingly. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific circumstances of the vehicle. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on location and other factors.

What does this mean?

Tech Notes for P0315 2015 Chevrolet Silverado

The crankshaft position (CKP) system variation learn procedure is done better with a scan tool, but if the Crankshaft Variation Relearn is not accessible through your scan tool (some truck applications 1998 & later), perform the relearn in the following manner:



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.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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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