OBD Guide

P2B22

Hybrid/EV Electronics Coolant Temperature Sensor B Circuit Low

Severity
🔴 High
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
  • Engine power limitation
  • Incorrect temperature readings on the dashboard

Causes

  • Temperature sensor B fault
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Wiring harness damage
  • Problems with the hybrid system control unit

How to Fix

  1. Check continuity of temperature sensor B circuit
  2. Inspect connectors and connections for corrosion or damage
  3. Check the resistance of the temperature sensor
  4. Replace the faulty temperature sensor if necessary
  5. Check the operation of the system after repair

Related codes

Error P2B22 by Vehicle Brand