P2D4E

Hybrid/EV Battery Pack J Over Temperature

Severity

🚨 Critical

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–1000 (est.)

Symptoms

Reduced vehicle power
Battery warning message on instrument panel
Maximum speed limit
The car goes into emergency mode
Increased noise from the battery cooling system

Causes

Battery cooling system malfunction
Dirty or clogged battery compartment ventilation ducts
Malfunction of temperature sensors in block J
Damage or degradation of battery cells
Problems with the battery module control electronics

How to Fix

Check the operation of the battery compartment cooling system
Clean the ventilation ducts of the battery pack
Check temperature sensor readings using a diagnostic scanner
Test J block battery cells for degradation
Update battery management module software (if updates are available)

Related codes

P2D4D P2D4F P0AA6