P2604Mazda Mx-5Years: 1996 - 2026
Coolant Control Valve / Pump (P2604)
Reviewed by ASE Certified Technician
What does this mean?
Code P2604 relates to the electric coolant pump or coolant control valve system.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Mazda Mx-5 models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Coolant leak or low coolant level
Faulty or stuck thermostat
Failed cooling fan motor
Damaged, chafed, or broken wiring harness
Symptoms to Watch For
- Check Engine Light is illuminated
- Engine overheating
- Coolant temperature warning light on
- Cooling fan not operating