P0E19

Hybrid/EV Battery Pack Coolant Heater B Control Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Reduced performance of the hybrid system
Increased fuel consumption (in hybrid models)
Reduced range (in electric vehicles)
Dashboard warning light
Reduced power in cold weather

Causes

Heating element malfunction
Problems with wiring or connectors
Control relay or fuse failure
Thermal controller malfunction
Software error in battery management module

How to Fix

Check heater circuit fuses and relays
Diagnose the condition of the heating element
Check the integrity of the wiring and connectors
Scan the battery management module for errors
If necessary, replace the heating element

Related codes

P0E18 P0E1A P0A80