P0ECA

Hybrid/EV Battery Temperature Sensor System - Multiple Sensor Correlation

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced performance of the hybrid system
Engine power limitation
Unusual battery temperature readings on the display
Activation of emergency operation

Causes

Malfunction of one or more battery temperature sensors
Open or short circuit in the sensor circuit
Poor contact in sensor connectors
Problems with the Battery Management Module (BMS)
Software error in the control system

How to Fix

Temperature Sensor Circuit Diagnostics
Checking resistance and sensor signals
Inspect connectors and wiring harness
Replacing faulty temperature sensors
Updating BMS software if necessary

Related codes

P0EC9 P0ECB P0AFA