P2B86

Coolant Pump A Overspeed/Air in System

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

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

Causes

Coolant pump malfunction
Air lock in the cooling system
Damage to pump wiring or connectors
Pump control module malfunction
Low coolant level

How to Fix

Check the coolant level and add if necessary
Remove air from the cooling system
Check the coolant pump for damage
Check the wiring and connectors of the pump
Replace the coolant pump if necessary

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