P2B28

Hybrid/EV Battery Pack Coolant Pump A Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–444 (est.)

Symptoms

Reduced vehicle power
Battery overheat warning on dashboard
Unusual noises from the battery area
Reducing the range of an electric vehicle
Activation of emergency operation

Causes

Pump motor malfunction
Blockage or leak in the cooling system
Problems with pump wiring or connectors
Faulty relay or fuse
Battery management module error

How to Fix

Check the level and condition of the coolant
Diagnose pump electrical circuits
Check pump functionality
Replace the faulty pump if necessary
Reset the error and check the system after repair

Related codes

P2B29 P0A80 P0A7F