P2B59
Engine Coolant Flow Control Valve Control Circuit/Open
P2B59 is an OBD-II diagnostic trouble code meaning: Engine Coolant Flow Control Valve Control Circuit/Open. Common causes: open or short circuit in valve control circuit, coolant flow control valve malfunction. Estimated repair cost: $17–56.
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
- Check valve control circuit integrity
- Check valve resistance to specifications
- Inspect connectors and contacts for corrosion or damage
- Check the operation of the relay and the condition of the fuses
- If necessary, replace the coolant flow control valve.
Related codes
Error P2B59 by Vehicle Brand
FAQ
What does the P2B59 code mean?
P2B59 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Flow Control Valve Control Circuit/Open
What causes a P2B59 error code?
The most common causes of P2B59 include: 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.
How do I fix a P2B59 diagnostic trouble code?
To fix P2B59: Check valve control circuit integrity. Check valve resistance to specifications. Inspect connectors and contacts for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2B59?
Limited driving only, diagnose soon
How much does it cost to fix P2B59?
The estimated repair cost for P2B59 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat