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P0315 2017 Chevrolet Silverado Code - Crankshaft Position System Variation Not Learned

Quick Answer

The P0315 diagnostic trouble code (DTC) in a 2017 Chevrolet Silverado indicates that the crankshaft position system variation has not been learned by the engine control module (ECM). Common causes include Faulty crankshaft position sensor, Timing chain issues, ECM malfunction. 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 2017 Chevrolet Silverado indicates Crankshaft Position System Variation Not Learned.
Common causes
Common causes include Faulty crankshaft position sensor, Timing chain issues, ECM malfunction.
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 16, 2024
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Code P0315 2017 Chevrolet Silverado Description

The P0315 diagnostic trouble code (DTC) in a 2017 Chevrolet Silverado indicates that the crankshaft position system variation has not been learned by the engine control module (ECM). This means that the ECM has not been able to accurately determine the position of the crankshaft in relation to the engine's timing. The crankshaft position sensor is responsible for detecting the position of the crankshaft and sending this information to the ECM, which uses it to control ignition timing and fuel injection. When the ECM cannot learn the crankshaft position system variation, it can lead to poor engine performance, misfires, and potentially even engine stalling.

OBDII Code P0315 2017 Chevrolet Silverado - Crankshaft Position System Variation Not Learned
P0315 2017 Chevrolet Silverado Code - Crankshaft Position System Variation Not Learned

Common Causes of P0315 2017 Chevrolet Silverado

  1. Faulty crankshaft position sensor
  2. Timing chain issues
  3. ECM malfunction
  4. Wiring problems
  5. Incorrect installation of components

Symptoms of P0315 2017 Chevrolet Silverado

  1. Engine misfires
  2. Rough idling or stalling
  3. Decreased fuel efficiency
  4. Illuminated check engine light
  5. Lack of power or acceleration

How to Fix P0315 2017 Chevrolet Silverado

  1. Diagnose the root cause of the issue by using a scan tool to check for the P0315 code and inspecting the crankshaft position sensor, timing chain, ECM, and wiring.
  2. Replace the faulty crankshaft position sensor if it is found to be the cause of the problem.
  3. Check and adjust the timing chain if it is damaged or misaligned.
  4. Repair any wiring issues or replace damaged wiring.
  5. Clear the DTC and perform a crankshaft position system variation learn procedure using a scan tool to reset the ECM's memory.

Cost to Fix P0315 2017 Chevrolet Silverado

The typical repair costs for addressing a P0315 code in a 2017 Chevrolet Silverado can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower rates. For a more accurate estimate, it is recommended to inquire with local auto repair shops.

What does this mean?

Tech Notes for P0315 2017 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.

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