Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The ECM does not illuminate the malfunction indicator lamp (MIL).
The ECM uses Park/Neutral Switch data to enable engine cranking.
The ECM stores the operating conditions when the Conditions for Setting the DTC are met. This information is stored as a Failure Record.
The ECM stores DTC P0852 in ECM history.