Car Problem Reports

Hyundai Sonata Rough Idle Due to Faulty EGR Switching Valve

Hyundai Sonata Problem
61 Reports
Me Too

Model Years Affected: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011

Engines Affected: 2.0L 4 Cylinder, 2.4L 4 Cylinder, 2.5L V6, 2.7L V6, 3.3L V6

Average Mileage: 105,047 mi (11,386 mi - 200,000 mi)


On the 2.7L V6 and 2.4L 4 Cylinder, a defective exhaust gas recirculation (EGR) switching valve may cause an intermittent rough or unstable idle engine.

  • rmkjmk, , 2.4L 4 Cylinder, 93,560 mi

    engine idles rough when in drive but not in neutral

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  • Visitor, , 2.4L 4 Cylinder, 110,000 mi

    Rough idle, lack of acceleration at times, and poor gas mileage.

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  • Visitor, , 2.4L 4 Cylinder, 37,000 mi

    Rough idle when stopped. Car shakes a lot.

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  • revroysail, , 2.4L 4 Cylinder, 67,000 mi

    engine light indicated need to repalce EGR valve. Did so a a week later it says the same thing again and idle is rough again. Why????

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  • Visitor, , 2.4L 4 Cylinder, 150,000 mi

    Rough idle and engine seems very rough while accelerating from a dead stop. Runs well at cruising speed. Only seem rough when the engine is under load.

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  • Visitor, , 2.4L 4 Cylinder, 45,600 mi

    Rough and unstable engine. Feels like gas is choked from engine or loose battery wires. Then car takes off. Scary! Not fixed yet

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  • Visitor, , 2.4L 4 Cylinder, 116,000 mi

    She runs ruff when idleing and even worse if the a/c is running . The shaking slows down if i put her in drive or neutral.

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  • pbc90723, , 2.4L 4 Cylinder, 80,000 mi

    Roough idle, jerks a little when driving, began to stall. Will change Throttle Position Sensor and see what happens.

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  • Visitor, , 2.4L 4 Cylinder

    Failed emissions due to egr

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  • Visitor, , 2.7L V6, 100,695 mi

    Check engine light, rpm fluctuations, shakes at stoplights. Also, has stalled when getting gas.

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