P0E1B

Hybrid/EV Battery Pack Coolant Pump B Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced performance of the hybrid system
Warning messages on the dashboard
Battery overheating
Increased noise from the cooling pump
Reduced cooling system efficiency

Causes

Open or short circuit in the pump control circuit
Pump solenoid valve malfunction
Problems with the wiring harness or connectors
Control unit malfunction
Pump power problems

How to Fix

Check the integrity of the pump control circuit
Inspect connectors and wiring harness for damage
Check voltage on control circuit
Test the operation of the cooling pump
If necessary, replace the pump or its components

Related codes

P0E1A P0E1C P0E1D