Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0340 is a Type B DTC.
The CMP actuator, if equipped, is commanded to the Park position.
The ignition system defaults to a failed CMP sensor limp-home mode.