P2CF8

Engine Coolant Bypass Valve D Control Circuit Driver Current/Temperature Too High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Engine overheating
Unstable engine temperature
Check engine light comes on
Reduced cooling system efficiency

Causes

Coolant Bypass Valve D Malfunction
Damage to wiring or connectors
Problems with the engine control unit
Short circuit in control circuit

How to Fix

Check the condition of the coolant bypass valve D
Inspect wiring and connectors for damage
Check resistance and voltage in control circuit
Replace faulty valve if necessary
Reset the error code and check if it returns

Related codes

P2CF7 P2CF9 P2CFA