Hyundai Sonata Problem Report

Hyundai Sonata Rough Idle Due to Faulty EGR Switching Valve

(65 reports)

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.

engine idles rough when in drive but not in neutral -
Rough idle, lack of acceleration at times, and poor gas mileage. -
Rough idle when stopped. Car shakes a lot. -
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???? -
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. -
Rough and unstable engine. Feels like gas is choked from engine or loose battery wires. Then car takes off. Scary! Not fixed yet -
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. -
Roough idle, jerks a little when driving, began to stall. Will change Throttle Position Sensor and see what happens. -
Failed emissions due to egr -
My 2004 Hyundai Sonata 2.7 V6 started having a rough, low rpm idle after it hit 105,000 miles. I haven't had it repaired yet but plan to do the work myself. Thanks cor the helpful information, much appreciated! -
Check engine light, rpm fluctuations, shakes at stoplights. Also, has stalled when getting gas. -
Car started shaking a lot when parked and engine was at idle. Check engine light is on and car shakes when in stopped in Park or Drive, but not neutral. -
When car is idle on stop, rattling noise. But on neutral or drive sound dissipates. -
Check engine light came on the first time when we were up at elevation. From there the engine (at different times) seemed to idle a little rough and get worse gas mileage. -
check engine light is on, car running a little rough. -
My sonata dies when I slow down at red lights and when I slow down to make a turn. -
Exactly as stated. Rough idle in drive. Replaced the canister purge switching valve, [easy], problem solved. This model has no EGR valve, likewise no EGR. -
Exact problem as stated. On my Sonata there is no EGR stitching valve or EGR valve. There is however, a canister purge valve. That corrected the problem. -
Third EGR Valve since 2012! Help -
my 2003 hyundai sonata 2.4 vibrates so hard when I'm at idle calms down in neutral -
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