Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
P2600
The ECM detects the pump control circuit is open. The condition exists for 4 S or a cumulative of 30 S.
P2601
The ECM detects that the ECT decreases less than 2 °C (4 °F) within 60 S. The condition exists for 4 S or a cumulative of 30 S.
P2602
The ECM detects the pump control circuit is shorted to ground. The condition exists for 4 S or a cumulative of 30 S.
P2603
The ECM detects the pump control circuit is shorted to voltage. The condition exists for 4 S or a cumulative of 30 S.