P2B5A

Engine Coolant Flow Control Valve Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

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 flow control valve malfunction
Open or short circuit in control circuit
Poor contact in connectors
Engine control unit malfunction
Problems with power or grounding of the circuit

How to Fix

Check the integrity of the valve control circuit
Check connectors and contacts for corrosion or damage
Check valve resistance (compare with factory values)
Check valve operation when power is applied
If necessary, replace the coolant flow control valve.

Related codes

P2B5B P2B5C P2B5D