P2B63

Coolant Pump B Stuck/Stalled

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$67–167 (est.)

Symptoms

Engine overheating (especially after stopping)
Loss of engine power
Enabling emergency operation
Hot air from the interior heating system
Noise or hum from the pump area

Causes

Pump bearing jamming
Open or short circuit in the pump control circuit
Pump motor failure
Relay or fuse problems
Cooling system is dirty or clogged

How to Fix

Check fuses and pump relays
Diagnose the power and control circuit
Check the mechanical part of the pump for jamming
Replace auxiliary water pump if necessary
Flush the cooling system if contamination is detected

Related codes

P2B64 P2B65 P2610