Display group 33

Fig 1: Display Group 33 - Oxygen Sensor (O2S) Control - Oxygen Sensor (O2S) Learned Values Before Three Way Catalytic Converter

Courtesy of VOLKSWAGEN OF AMERICA, INC.

NOTE: In the previous graphic, for Evaluation, refer to:

Evaluating display group 33, display zone 2 - Oxygen Sensor (O2S) control before Three Way Catalytic Converter (TWC)
Evaluating display group 33, display zone 1 - Oxygen Sensor (O2S) control before Three Way Catalytic Converter (TWC)

Note on display zone 1:

The display must swing around 0.0%. If 0.0% is constantly displayed, the Oxygen Sensor (O2S) control has switched from control to control because a malfunction has occurred in the Oxygen Sensor (O2S) control. Check DTC memory. See DTC memory, checking and erasing .