P0665
PPowertrainIntake Manifold Tuning Valve Control Circuit High (Bank 2)
What does this code mean?
Severity : LowP0665 means the control module sees a voltage that is too high on the intake manifold tuning valve control circuit, bank 2. This valve changes the air path inside the manifold to optimise torque across the rev range. A faulty circuit leaves it stuck in one position.
Symptoms
- Check engine light on.
- Slight loss of torque at certain engine speeds.
- Idle sometimes rough.
- Often few noticeable symptoms.
Possible causes
- Faulty tuning valve actuator or solenoid.
- Wiring shorted to voltage or open.
- Corroded or unplugged connector.
- Faulty engine control module, less commonly.
Diagnosis and repair
- Inspect the actuator connector and wiring.
- Measure actuator resistance and compare with factory values.
- Run an actuator test with the scan tool.
- Check that the flap moves freely inside the manifold.
- Replace the actuator if needed, then clear the code and road test.
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Code
P0665
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012