8.0

pretty bad
Typical Repair Cost:
No data
Average Mileage:
19,400 miles
Total Complaints:
1 complaints

Most common solutions:

  1. not sure (1 reports)
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problem #1

Jan 222018

Sonata Sport 2.4L Sport

  • Automatic transmission
  • 19,353 miles

click to see larger images

rough idle and poor acceleration

Took the car in on January 22nd with the Check Engine Light On and the Vehicle Diagnostics Message ..."A possible condition with your Engine Control System has been detected. A full system check is recommended soon." Symptoms include very poor acceleration, idle speed of 1700 rpm, lots of white smoke from the exhaust, and the car moves forward from an up slope position even though the gas is not pressed. Quite dangerous to drive.

The service tech other than doing a standard 19,000 mile service - fuel system treatment, filter, engine oil and gasket plug change, also did a scan. The code was P001000 - "Found the E-CVVT cover to NE full of oil, found oil plug to have shifted and leaking oil into E-CVVT cover causing code and contaminated cover".

The parts are on SPECIAL order, but they were unable to tell me when they will have them in. So have to wait an indefinite time ... Isn't there a factory in Alabama ? Would they be able to forecast/estimate some sort of delivery time. 1. 24360-2GGB0 Cover Assembly 2. 24351-2GGA1 Plug

The service department at Fairfax Hyundai told me that these unavailable parts have nothing to do with the engine idling at high RPMs, the poor acceleration and the excessive white exhaust smoke. SO it was OK to still drive around with the car and the check engine light on plus with the vehicle diagnostics constantly reporting an ECS problem. They have the car, I have a loaner. It's been a month and still no ETA for the parts.

Logically, the E-CVVT (Constant Variable Valve Timing) would affect the idling and acceleration wouldn't it ?

I am wondering if there is an additional problem with the engine which they either have not been able to check or have not discovered.

- khalilab, Herndon, US