Action Taken PCM

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

PCM performs the following actions if DTC is set:

The PCM does not illuminate the MIL.
The PCM disables the PC solenoid valve, defaulting the transmission to maximum line pressure.
The PCM freezes shift adapts.
The PCM records the operating conditions when the conditions for setting the DTC are met. The PCM stores this information as failure records.
The PCM stores DTC P0748 in PCM history.