P2E42

Hybrid/EV Electronics Coolant Pump B Performance

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$133–389 (est.)

Symptoms

Fault message on the instrument panel
Reduced vehicle power in hybrid mode
Overheating of electronic components
Noises or humming from the coolant pump
Enabling emergency system operation

Causes

Coolant pump motor malfunction
Problems in the electrical power supply circuit of the pump
Air lock in the cooling system
Contamination or loss of coolant properties
Mechanical damage to the pump impeller

How to Fix

Diagnostics of the pump electrical circuit (checking fuses, relays, wiring)
Checking the functionality of the coolant pump
Removing air pockets from the cooling system
Replacing coolant according to manufacturer specifications
Replacing the electric cooling pump if it malfunctions

Related codes

P2E40 P2E41 P0E42