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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Common Symptoms
- Engine overheating
- No coolant circulation
- Temperature warning light on
- Reduced engine performance
Probable Causes (Ranked by Likelihood)
- 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
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
Step-by-Step Diagnostic Procedure
-
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)
Commonly Affected Vehicles
- 2012-2020 BMW 328i
- 2010-2018 Toyota Prius
- 2014-2020 Ford Fusion Hybrid
- 2013-2020 Chevrolet Volt
Related Codes
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