Pcm Code P052 - Pcm Memory Reset: Notes
WARNING: This page is about a different car, the 1993 Cadillac Seville and 1993 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
This code test monitors PCM long term memory for a loss or unintended change of data. If battery power or ground is disconnected, PCM Code P052 will set, and should be cleared when battery power is restored. PCM keeps a running check on memory. If memory changes, Code P052 resets. If P052 is accompanied by driveability symptoms and/or other stored codes. Check for intermittent loss of power or ground to PCM, and inspect PCM connectors.