Code result
P2604
Coolant Pump Control Circuit High
Moderate severity
What it means
The electric coolant pump drive line reads above the upper threshold — usually a short to positive or a stuck-on driver stage.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Drive line shorted to positive
highOne of the most commonly reported causes for this code — check this first.
Driver stage shorted on
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2604 freeNo credit card required