P2B59

Symptoms

• Engine overheating
• The engine takes a long time to warm up
• Unstable operation of the interior heater
• Check Engine light comes on
• Reduced cooling system efficiency

Causes

• Open or short circuit in valve control circuit
• Coolant flow control valve malfunction
• Problems with the relay or circuit fuse
• Engine control unit (ECU) malfunction
• Oxidation or damage to valve connector contacts

How to Fix

1. Check valve control circuit integrity
2. Check valve resistance to specifications
3. Inspect connectors and contacts for corrosion or damage
4. Check the operation of the relay and the condition of the fuses
5. If necessary, replace the coolant flow control valve.

Related codes

Error P2B59 by Vehicle Brand