P2B65

Coolant Pump B Overspeed/Air in System

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$33–111 (est.)

Symptoms

Engine overheating
Unstable engine operation
Coolant leak
Coolant pump noise
Check engine light is on

Causes

Coolant pump malfunction
Air in the cooling system
Coolant leak
Thermostat malfunction
Problems with the pump electrical circuit

How to Fix

Check coolant level
Remove air from the cooling system
Check the coolant pump for leaks
Replace the coolant pump if necessary
Check the electrical circuit of the pump

Related codes

P2B66 P2B67 P2B68