P2B5E

Symptoms

• Incorrect engine temperature readings on the dashboard
• Engine overheating
• Reduced engine performance
• Turning on the Check Engine Light
• Unstable operation of the cooling system

Causes

• Open or short circuit in the wiring to the sensor
• Faulty valve position sensor
• Poor electrical connection or corroded connectors
• Flow control valve itself is faulty
• Problems with the engine ECU (rare)

How to Fix

1. Visual inspection of wiring and connectors for damage and corrosion
2. Checking the voltage and resistance of the sensor with a multimeter
3. Cleaning electrical connector contacts
4. Replacing a faulty position sensor
5. Check and, if necessary, replace the coolant flow control valve

Related codes

Error P2B5E by Vehicle Brand