P2CF6

Hybrid/EV Battery Pack Coolant Pump B Overspeed /Air in System

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced power or efficiency of the hybrid system
Battery overheat indicator on the dashboard
Unusual noises from the battery compartment area
Reduced electric range
Activation of emergency operation

Causes

Air lock in the cooling system
Coolant pump malfunction
Low coolant level
Problems with the pump's wiring or connectors
Pump control error on the ECU side

How to Fix

Check the level and condition of the coolant
Bleed the cooling system to remove air
Check the functionality of the coolant pump
Inspect the pump wiring and connections
Read additional fault codes

Related codes

P2CF5 P2CF7 P0A80