General Information

Component Location

General Description

The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the camshafts. This system controls the camshaft to provide optimal valve timing. The PCM controls the Oil Control Valve (OCV), based on the signals output from air flow, throttle position and engine coolant temperature. The CVVT controller regulates the camshaft angle using oil pressure through the OCV. As result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease under overall driving conditions.

DTC Description

DTC P0016 is set when the actual camshaft position is retarded beyond the reference value. This condition may be caused by incorrect mechanical timing.

DTC Detecting Condition





Signal Waveform & Data

1. Connect GDS and select Data Analysis.
2. After warming-up, check following items.




3. Data analysis
- A Sector : CVVT works
- B Sector : Limp Home Mode (CVVT doesn't work).
- CVVT Control Flow (A Sector)
: Acceleration pedal (1) shift -> Engine RPM change -> Camshaft Position Setpoint (2) change -> CVVT Valve Duty (3) change -> Inlet CAM Position (4) change