P2D4B

Hybrid/EV Battery Pack G Over Temperature

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–889 (est.)

Symptoms

Reduced vehicle power
Switching to emergency mode
Battery overheat warning on dashboard
Reducing the range of an electric vehicle
Starting system failure

Causes

Battery cooling system malfunction
Clogged or dirty battery cooling radiator
Faulty battery temperature sensors
Damage to battery cells
Excessive load on the battery

How to Fix

Check the level and condition of the coolant
Inspect the radiator and fans of the battery cooling system
Check the operation of battery temperature sensors
Diagnose the condition of battery cells
Check the wiring harness to the temperature sensors

Related codes

P2D4A P2D4C P0AA6