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P0315 Chevrolet Code - Crankshaft Position System Variation Not Learned

- Code Popularity: 58,728 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0315 Chevrolet?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Crankshaft Position (CKP) system variation learning
  • Faulty Crankshaft Position
  • Crankshaft Position sensor harness is open or shorted
  • Crankshaft Position sensor circuit poor electrical connection
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How to Fix the DTC P0315 Chevrolet?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

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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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0315 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine fails to start
  • Engine runs rough

Code P0315 Chevrolet Description

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. The calculated error allows the Engine Control Module (ECM) to accurately compensate for reference period variations. This enhances the ability of the ECM to detect misfire events over a wider range of engine speed and load.
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.
OBDII Code P0315 Chevrolet - Crankshaft Position System Variation Not Learned - AutoCodes.com
P0315 Chevrolet Code - Crankshaft Position System Variation Not Learned

Need More Information on the Code?

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Code P0315 Chevrolet comments

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