Hyundai Sonata Problem Report
Hyundai Sonata Rough Idle Due to Faulty EGR Switching Valve
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 - rmkjmk
Rough idle, lack of acceleration at times, and poor gas mileage. - Visitor
Rough idle when stopped. Car shakes a lot. - Visitor
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???? - revroysail
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. - Visitor
Rough and unstable engine. Feels like gas is choked from engine or loose battery wires. Then car takes off. Scary! Not fixed yet - Visitor
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. - Visitor
Roough idle, jerks a little when driving, began to stall. Will change Throttle Position Sensor and see what happens. - pbc90723
Failed emissions due to egr - Visitor
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! - Visitor
Check engine light, rpm fluctuations, shakes at stoplights. Also, has stalled when getting gas. - Visitor
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. - Visitor
When car is idle on stop, rattling noise. But on neutral or drive sound dissipates. - Visitor
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. - jamminj
check engine light is on, car running a little rough. - Visitor
My sonata dies when I slow down at red lights and when I slow down to make a turn. - Visitor
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. - OldFrt
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. - Visitor
Third EGR Valve since 2012! Help - Visitor
my 2003 hyundai sonata 2.4 vibrates so hard when I'm at idle calms down in neutral - Visitor
The car vibrates when idling in any gear (not neutral or park). It is also very sluggish at tak...
For a month my car has tried to stall and shakes like crazy when I am idling. No codes ever sh...
Did tune up-Dist. cap/rotor/wires/plugs.96k miles. Ran 1 week ok then dead hole miss. Compres...
i replaced the egr valve on my 2001 sonata and it still idles rough. could it be the egr soleno...
When I switch on the a/c of my Hyundai Sonata it blows air which is not cold. The A/c switch sh...