P2B29

Hybrid/EV Battery Pack Coolant Pump A Overspeed - Dry Run

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Battery overheat warning on dashboard
Hybrid system power reduction
Increased noise from the cooling pump
Reduced battery efficiency

Causes

Low coolant level
Leak in the battery cooling system
Cooling system clogged
Cooling pump malfunction
Problems with the pump electrical circuit

How to Fix

Check the coolant level and add if necessary
Inspect the system for leaks
Check the cooling pump for functionality
Diagnose the electrical circuit of the pump
If necessary, replace the cooling pump

Related codes

P2B28 P2B2A P0A80