P2D55

Hybrid/EV Battery Pack Coolant Temperature Sensor C Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hybrid system power reduction
Switching to emergency mode
Battery warning indicator on instrument panel
Unstable operation of the battery cooling system
Increased fuel consumption (for hybrids)

Causes

Short circuit in the sensor circuit
Coolant temperature sensor malfunction
Wiring harness damage
Poor contact in the sensor connector
Problems with the hybrid system control unit

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and wiring for damage
Check the resistance of the temperature sensor
Replace the coolant temperature sensor if necessary
Reset the error code and check the system after repair

Related codes

P2D54 P2D56 P0A7F