Coolant Pump Control Circuit Open
The P2500 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
- $300 - $900 (parts and labor)
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Common Symptoms
- Engine overheating
- Coolant temperature warning light on
- Reduced engine performance
- Steam from engine bay
Probable Causes (Ranked by Likelihood)
- Failed electric coolant pump Very High
- Open circuit in coolant pump wiring High
- Blown coolant pump fuse or relay Moderate
- Faulty ECM coolant pump driver circuit Low
Step-by-Step Diagnostic Procedure
-
Check coolant pump fuse and relay for continuity
-
Inspect wiring harness to electric coolant pump for damage
-
Test coolant pump motor with direct 12V power supply
-
Measure ECM output signal at coolant pump connector
Frequently Asked Questions
Can I drive with code P2500?
No. Without a functioning coolant pump the engine will overheat rapidly, risking severe damage. Have the vehicle towed.
What does the electric coolant pump do?
It circulates coolant through the engine independently of engine speed, providing efficient cooling especially in hybrid and turbocharged vehicles.
How much does an electric coolant pump cost to replace?
Replacement typically costs $300 to $900 including parts and labor depending on the vehicle.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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