Code result
P2B85
Engine Coolant Pump Underspeed
High severity
What it means
The engine coolant pump runs below the calibrated minimum speed for the commanded duty. Mechanical resistance high or supply voltage low.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Mechanical load increased (binding)
highOne of the most commonly reported causes for this code — check this first.
Supply voltage low under load
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2B85 freeNo credit card required