Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSHYUNDAI2009SONATA SE, 3.3 FREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISDTC TROUBLESHOOTING PROCEDURES - 3.3L (2 OF 2)TROUBLESHOOTING FOR DTCDTC P0660: INTAKE MANIFOLD TUNING VALVE CONTROL CIRCUIT/OPEN (BANK 1)DTC DETECTING CONDITION

2009 Hyundai Sonata SE, 3.3 F

DTC P0660: Intake Manifold Tuning Valve Control Circuit/Open (Bank 1): DTC Detecting Condition

2009 Hyundai Sonata SE, 3.3 FSECTION DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	Signal low, high	Poor connection Open or short in VIV circuit Faulty VIV Faulty PCM
Enable Condition	After 0.5 sec under conditions below Engine works 11V ≤ Battery voltage ≤ 16V
Threshold value	Open or short
Diagnosis time	Continuous (More than 5 seconds failure for every 10 seconds test)
MIL ON Condition	2 driving cycles

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.