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The problem: Affected vehicles may display a check engine light, slight hesitation or reduced power during acceleration, erratic shifting from the transmission during acceleration or a clicking noise from the engine when engine speed is increased. On 2015 Sonatas only, the check engine light may illuminate, the electronic stability control warning light may illuminate or the car may exhibit limited engine power.
Vehicles affected by this service bulletin:
- 2015 Hyundai Sonata
- 2016 Hyundai Sonata
Equipped with the 2.4-liter GDI engine.
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Corrective action: Dealers will update the engine control module software and possibly replace the vacuum control motor assembly if it fails the diagnostic test.
Warranty info: This service bulletin is being performed free of charge under the limited new-car warranty.
What owners should do: Call your local dealer with your vehicle's identification number to determine if your vehicle is involved in this service bulletin. You can call Hyundai at 800-633-5151 or the National Highway Traffic Safety Administration hotline at 888-327-4236. Reference TSB No. 06-01-004-1.
Need to find a dealer for service? Go to Cars.com Service & Repair to find a local dealer.
Editor's note: This is only one of dozens of service bulletins issued each month by automakers. Please check your automaker's website to see if your vehicle has any service bulletins pending.
Check for recalls here on Cars.com.
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