Variable Valve Timing Monitoring

Variable Valve Timing Monitoring

General Description
In order to optimize engine torque, horsepower and engine emission the vehicle of this OBD group are equipped with a continuous variable valve timing camshaft on the intake side.

Monitor function description
The VVT system will be monitored for:

"Slow response":
Slow response of camshaft system causing an emission
increase to 1.5 x standard (slow response failure)

and

"Target error"

Camshaft system does not react to computer command (stuck failure).


Charts and flow charts