Conditions for Setting the DTC

WARNING: This page is about a different car, the 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

P034A

The crankshaft position is incorrect by greater than 2 crankshaft reluctor wheel teeth during 2 out of 3 auto-start events.
The crankshaft position is incorrect by at least 1 crankshaft reluctor wheel tooth during 4 out of 5 auto-start events.

P034B

The crankshaft position sensor detects 3 or more engine rotation reversals within 10 s or less.