P2B21

Symptoms

• Incorrect coolant temperature readings
• Check Engine Light Illuminates
• Reduced performance of the hybrid system
• Overheating of electronic components
• Incorrect operation of the cooling system

Causes

• Coolant temperature sensor B malfunction
• Open or short circuit in the sensor circuit
• Poor contact in sensor connectors
• Problems with the control module
• Sensor is dirty or damaged

How to Fix

1. Check the integrity of the sensor circuit
2. Check sensor contacts and connectors
3. Replace coolant temperature sensor B if necessary
4. Check and, if necessary, replace the control module
5. Clean or replace damaged wires

Related codes

Error P2B21 by Vehicle Brand