P26BB

Symptoms

• Engine overheating
• The engine takes a long time to warm up
• Unstable engine operation
• Increased fuel consumption
• Check Engine light comes on

Causes

• Coolant bypass valve malfunction
• Valve electrical circuit problems
• Valve is dirty or clogged
• Engine control unit (ECU) malfunction
• Mechanical damage to the valve or its actuator

How to Fix

1. Check the electrical circuit of the valve for breaks and short circuits
2. Check valve resistance and operation
3. Clean or replace coolant bypass valve
4. Check and, if necessary, update ECU software
5. Check the cooling system for leaks and proper operation

Related codes

Error P26BB by Vehicle Brand