WARNING
✽ NOTICE - Kick down mechanism (if equipped)
If your vehicle is equipped with a kick down mechanism in the accelerator pedal, it prevents you from driving at full throttle unintentionally by making the driver require increased effort to depress the accelerator pedal. However, if you depress the pedal more than approximately 80%, the vehicle can be at full throttle and the accelerator pedal will be easier to depress. This is not a malfunction but a normal condition.
Kia Cee'd JD Service Manual: CVVT & Camshaft Description and operation
Description
Continuous Variable Valve Timing (CVVT) system advances or retards the valve
timing of the intake and exhaust valve in accordance with the ECM control signal
which is calculated by the engine speed and load.
By controlling CVVT, the valve over-lap or under-lap ...
Kia Cee'd JD Service Manual: Troubleshooting
Troubleshooting
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The battery must be in good condition and fully charged for
this troubleshooting.
...