P2D52

Hybrid/EV Battery Pack Coolant Temperature Sensor C Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–83 (est.)

Symptoms

Check engine light comes on
Reduced performance of the hybrid system
Reduced power or increased fuel consumption
Incorrect battery temperature readings on the dashboard

Causes

Hybrid battery coolant temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contacts or oxidation of connectors
Wiring harness damage
Hybrid ECU malfunction

How to Fix

Checking the voltage and resistance in the sensor circuit
Inspecting and cleaning the sensor connector contacts
Checking the integrity of electrical wiring
Replacing the coolant temperature sensor if necessary
Repair only from an authorized dealer

Related codes

P2D51 P2D53 P2D54