OBD Guide

P2B27

Hybrid/EV Electronics Coolant Temperature Sensor C Circuit High

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced performance of the hybrid system
  • Overheating of electronic components
  • Incorrect temperature readings on the dashboard
  • Activation of emergency operation

Causes

  • Coolant temperature sensor C fault
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Problems with the hybrid system control unit
  • Corroded contacts or damaged wiring harness

How to Fix

  1. Check the condition of the coolant temperature sensor C
  2. Check the integrity of the circuit and wiring harness
  3. Clean or replace sensor connector if necessary
  4. Check and replace sensor if necessary
  5. Reset the error code and check the system

Related codes

Error P2B27 by Vehicle Brand