GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The ECM monitors battery voltage continuously after power-up. This code will set if the ECM sees the voltage to be below 2.5 volts. If battery voltage is not actually low, but because of a circuit fault, the ECM sees it as low, 14 volts will be selected as a default battery voltage.

DTC Parameters

This DTC P0560 will set when:

    • Vehicle speed is present
    • Engine running greater than 3 min.
    • ECM see battery voltage less than 2.5 volts
    • Above condition met for 180 milliseconds

P0560 is a (type D) DTC.

Diagnostic Aids

Possible cause:

ECM internal failure