P2B5C — Engine Coolant Flow Control Valve Supply Circuit Low

What Does P2B5C Mean?

P2B5C is a diagnostic trouble code indicating: Engine Coolant Flow Control Valve Supply Circuit Low. This code relates to the vehicle systems system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2B5C

⚠️ Check Engine Light (MIL) illuminated
⚠️ Engine Coolant Flow Control Valve Supply reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ System warning light illuminated

Common Causes

🔍 Open or broken wire in Engine Coolant Flow Control Valve Supply circuit
🔍 Poor ground connection at Engine Coolant Flow Control Valve Supply
🔍 Faulty Engine Coolant Flow Control Valve Supply with no output signal
🔍 Disconnected or loose Engine Coolant Flow Control Valve Supply connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P2B5C mean?

P2B5C indicates: Engine Coolant Flow Control Valve Supply Circuit Low. The vehicle's computer has detected that the Engine Coolant Flow Control Valve Supply is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P2B5C?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2B5C for extended periods may cause additional problems.

How much does it cost to fix P2B5C?

Repair costs for P2B5C typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Repair broken wire or restore ground in Engine Coolant Flow Control Valve Supply circuit
🔧 Clean and secure Engine Coolant Flow Control Valve Supply connector and ground points
🔧 Replace failed Engine Coolant Flow Control Valve Supply

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P2B5C: Engine Coolant Flow Control Valve Supply Circuit Low