P065F

What it means

P065F is a generic powertrain code meaning the intake manifold tuning valve on bank 2 is not performing as the engine control unit expects. The control unit commands the valve to change the intake runner length or flow path and checks the position feedback or engine response. If the valve sticks, moves too slowly or does not reach the commanded position, the code sets.

Symptoms

• Engine management light on
• Loss of power or flat spot at certain engine speeds
• Reduced mid-range torque or poor top-end performance
• Rough running or hesitation
• Poorer fuel economy
• Possible rattling or buzzing noise from the intake manifold area

Possible causes

• Intake manifold tuning valve or flap mechanism sticking, carbon-fouled or seized on bank 2likely
• Faulty or leaking vacuum actuator, hose or vacuum supply (on vacuum-operated systems)likely
• Electrical fault in the valve actuator, solenoid, position sensor or their wiring and connectorspossible
• Broken or disconnected linkage between the actuator and the valve or flappossible
• Intake air leak around the manifold affecting valve operation or the control unit's readingspossible
• Faulty engine control unit driver circuit or outdated software, where a known issue exists for the enginerare

How to diagnose

1. Read the stored codes and freeze frame data, noting engine speed, load and temperature when the code set, and check for other related codes
2. Visually inspect the bank 2 intake manifold area, vacuum hoses, actuator and linkage for damage, disconnection or cracking
3. Inspect the wiring and connectors to the tuning valve actuator and position sensor for corrosion, chafing or loose pins
4. Check live data for commanded versus actual valve position while operating the valve with a bidirectional scan function, if available
5. Test the vacuum supply and actuator holding ability on vacuum-operated systems, following the manufacturer's procedure for that engine
6. Check the actuator or solenoid electrical supply, ground and signal against specification, as the procedure varies by model and engine
7. Remove the intake components if needed to inspect the valve or flap for carbon build-up, free movement and linkage wear
8. Check for any manufacturer service bulletins or software updates relevant to the engine

How to fix

• Clean or replace the sticking intake manifold tuning valve or flap assembly
• Replace the faulty actuator, solenoid or position sensor
• Repair or replace leaking or damaged vacuum hoses or the vacuum supply component
• Repair damaged wiring or connectors in the valve circuit
• Replace the broken linkage or the whole manifold if the flap mechanism is not serviceable separately
• Update the engine control unit software only if an outdated calibration is a known cause for that engine

Can I keep driving?

Nearby codes

• P065EGenericIntake Manifold Tuning Valve Performance Bank 1
• P0660GenericIntake Manifold Tuning Valve Control Circuit/Open Bank 1