novanet Posted June 24, 2004 Report Share Posted June 24, 2004 Here it is: P0315 - Crankshaft position (CKP) system variation values are not stored in the PCM memory Had the local Autozone guy pull it off. Strangely, the scanner said that there was 2 codes thrown, but when we checked, they were both the same code. Drove the truck for a little while, seemed fine to me, but I'm real nervous about it. Can't get ahold of Allen right now. Anybody got any input? Link to comment Share on other sites More sharing options...
Nightshift Posted June 24, 2004 Report Share Posted June 24, 2004 There's something about a relearn process, there is a topic out here somewhere. I've heard a few trucks get nailed with it swapping PCM's. I've plugged in 4 PCM updates and so far had no issues. It's not supposed to be a big deal to remedy. WW Link to comment Share on other sites More sharing options...
SuperSport Posted June 25, 2004 Report Share Posted June 25, 2004 I think sometimes there is just gliches in the PCM's, when i first ordered my nelson tune. It took 4 PCM's before my truck would even start, one of the reasons is because my PCM is the same one they use in the corvettes, which was unheard of at the time, but now for some reason a lot more trucks that are getting that same part #. Link to comment Share on other sites More sharing options...
cadowns Posted June 25, 2004 Report Share Posted June 25, 2004 This a common code after a PCM swap. You can go to your Dealer and they will use the Tech II tool and 15 minutes later you are back on the road. Same thing happen to me 1500 miles after the tune. This is something that you will want to have fixed. CD Link to comment Share on other sites More sharing options...
Big10Fan Posted June 25, 2004 Report Share Posted June 25, 2004 ya but if you goto the dealer doesnt that erase your performance tune... Link to comment Share on other sites More sharing options...
02denali Posted June 25, 2004 Report Share Posted June 25, 2004 ATTENTION: Your vehicle may not start unless this procedure is performed. GM introduced an anti-theft system in 1996 and newer vehicles. In order for your vehicle to start, you must perform the passkey relearn procedure. If your vehicle’s battery is low, it is recommended a battery charger be hooked up at this time. This Procedure will take approximately 20-30 minutes. After your PCM is installed, please perform the following. You may want to be outside your vehicle so shut the door, roll down the window. PROCEDURE: Insert key, attempt to start the vehicle and leave the key in the ON position. In some vehicles, the Battery and Security light will blink for several seconds, and then shut off. Then the Security light will then remain ON. Leave the ignition ON until the Security light goes OFF. This will take more than 5 mins. When the Security light goes OFF, turn the ignition to the OFF position. Leave ignition OFF for 20 Seconds. Attempt to start the vehicle again and leave the key in the ON position. In some vehicles, the Battery and Security light will blink for several seconds, and then shut off. Then the Security light will then remain ON. Leave the ignition ON until the Security light goes OFF. This will take more than 5 mins. Turn the ignition to the OFF position for 20 Seconds. Attempt to start the vehicle again and leave the key in the ON position. In some vehicles, the Battery and Security light will blink for several seconds, and then shut off. Then the Security light will then remain ON. Leave the ignition ON until the Security light goes OFF. This will take more than 5 mins. Once this entire procedure has been completed (three times) your vehicle will start on the fourth attempt. Note: Some vehicles perform the relearn in a different sequence. You may notice your security light, battery light and abs light will alternate. Once the security light is left out of the sequence that is considered one step. Repeat the procedure two more times and on the fourth time your vehicle will start. FAQs: - The procedure was just completed now my car is making a clicking noise when I attempt to start it. Your battery may have become too weak to crank the engine over. - I performed the procedure and my vehicle still doesn’t start Please repeat the procedure again. 210-626-0278 Link to comment Share on other sites More sharing options...
evandostert Posted June 25, 2004 Report Share Posted June 25, 2004 I had that problems first follow those directions and it will start. Link to comment Share on other sites More sharing options...
cadowns Posted June 26, 2004 Report Share Posted June 26, 2004 ya but if you goto the dealer doesnt that erase your performance tune... Big10Fan The camshaft relearn does not change the programing. I am not sure what the Tech II tools does, but the code has never returned. CD Link to comment Share on other sites More sharing options...
xtremes10 Posted June 27, 2004 Report Share Posted June 27, 2004 I get the same codes everytime I change the PCM. The same code everytime Link to comment Share on other sites More sharing options...
CraigBa Posted July 4, 2004 Report Share Posted July 4, 2004 The service engine light came on says it has the P0315 code but it still cranks up fine what do I need to do to erase it. thanks Link to comment Share on other sites More sharing options...
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