What are the common causes of P2600?

An open in the coolant pump A control circuit wiring. A failed coolant pump A. A loose or corroded connector on the pump A control circuit. A blown fuse feeding the coolant pump A circuit.

Read coolant pump A commanded status on a scan tool. Test the pump A control circuit for an open. Check the pump A fuse and relay. Inspect the pump A connector for corrosion. Replace coolant pump A if the circuit and power test good. Clear the code and retest.

P2600

Coolant Pump A Control Circuit/Open

System: Computer output circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P2600 means Coolant Pump A Control Circuit/Open.

Where it lives

For P2600, the circuit described runs through the pump. The description of P2600 reports the pump as open.

Check these first

An open in the coolant pump A control circuit wiring
A failed coolant pump A
A loose or corroded connector on the pump A control circuit
A blown fuse feeding the coolant pump A circuit

What to do next

Read coolant pump A commanded status on a scan tool
Test the pump A control circuit for an open
Check the pump A fuse and relay
Inspect the pump A connector for corrosion
Replace coolant pump A if the circuit and power test good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.