Coolant Pump Control Circuit Open
The P2600 code means the vehicle's onboard diagnostic system has detected: Coolant Pump Control Circuit Open. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $250 - $800 (parts and labor)
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What Are the Symptoms of P2600?
- Engine overheating
- No coolant circulation
- Temperature warning light on
- Reduced engine performance
What Causes P2600? (Most Likely First)
- Failed auxiliary coolant pump motor Very High
- Open wiring in coolant pump circuit High
- Blown coolant pump control fuse Moderate
- ECM pump driver circuit failure Low
Can I Still Drive with P2600?
No — stop driving. P2600 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
Is P2600 the same as P2500?
They are related but typically refer to different coolant pump circuits. P2600 often relates to the auxiliary or secondary coolant pump used in hybrid or turbocharged vehicles.
Can I drive with P2600?
No. Loss of coolant pump function will cause rapid overheating. Have the vehicle towed to prevent engine damage.
How many coolant pumps does my car have?
Many modern vehicles have two: a mechanical pump driven by the engine and an electric auxiliary pump. P2600 typically refers to the electric auxiliary pump.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2600?
-
Check coolant pump control fuse and relay
-
Test pump motor for continuity
-
Inspect wiring from ECM to coolant pump
-
Verify ECM output signal at pump connector
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P2600?
- 2012-2020 BMW 328i
- 2010-2018 Toyota Prius
- 2014-2020 Ford Fusion Hybrid
- 2013-2020 Chevrolet Volt
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