Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
The Crankshaft Position (CKP) system variation learn 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 powertrain control module (PCM) to accurately compensate for reference period variations. This enhances the ability of the PCM to detect misfire events over a wider range of engine speed and load. The PCM stores the CKP system variation values after a learn procedure has been performed. If the actual crankshaft position variation is not within the CKP system variation compensating values stored in the PCM, DTC P0300 may set. If the PCM detects that the CKP system variation values are not stored in the PCM memory, DTC P0315 sets.
---------- Post added at 01:53 PM ---------- Previous post was at 01:50 PM ----------
Change the crankposition sensor, it will not get better. Soon engine will fail to start and if it does it might run rough or cut out completely.
When you start your car it is always in open loop for about 2 minutes until HO2s are warmed up. Your car runs on the learned data matrix which gets totally updated about every 20 minutes of driving.
Never drive faster than your guardian angel can fly