Software problems of the 2014 Hyundai Sonata

The check engine light illuminated intermittently at 92k miles, then the engine started making noises intermittently, and then the vehicle was slow to accelerate intermittently. The knock sensor software upgrade had previously been installed. The synthetic oil had been changed at 82k and 86k. South point Hyundai changed the oil, replaced the battery and turbocharger at 92381 miles. Around 93246 miles the intermittent engine noises and intermittent no acceleration and slow acceleration are back, and the check engine light is not illuminating. Returned my Sonata to south point Hyundai who reports the engine is bad, but there are no diagnostic error codes, and they are waiting to hear back from Hyundai on how to proceed. Hence, the knock sensor software update is not a corrective action for detecting engine failure, alerting drivers to engine failure. The knock sensor software update is not an effective screen for engine defects. The engine noises occur when the vehicle is stationary, in motion, on a city street, and on a highway.

The software update per Hyundais "953" service campaign, when activated, reduces engine performance which could lead to accidents (due to insufficient acceleration, etc. ). I had the recent engine software update per Hyundai's 953 campaign. On 3/22/19, I exited a highway and slowed down prior to merging onto the next road. I needed to accelerate, however my engine bogged and hesitated significantly. As such, another car quickly approaching had to break heavily to avoid a collision with my car. I looked down and observed my engine light flashing. I took the car in to action Hyundai (millville, NJ), and they stated that the newly installed software had detected issues with my engine and automatically placed my engine in this low-power mode. I have since learned that I will be receiving a warranty engine replacement.