Circuit Description
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 transmission control module (TCM) continually performs a series of processing steps, known as a processing loop, during normal operation. The TCM must complete the processing loop within a specific time limit. The TCM will set if it does not complete two consecutive loops inside a predetermined time interval.
DTC P0613 is a type C DTC.