Rick's Free Auto Repair Advice

Posts Tagged: crank relearn

Crank Relearn

Crank Relearn — What is it and how to perform one A crank relearn is a process that the PCM goes through to recalibrate its knowledge of the relationship between the crankshaft and camshaft. That’s necessary because the crank and cam are connected by a timing chain or timing belt. Over time, the timing chain/belt can stretch and that stretch changes the relationship and timing between the crankshaft and camshaft. If the change/stretch is great enough, the PCM will notice discrepancies between the commanded valve timing adjustments and the actual … Read More

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