Display group 37 -Oxygen sensor control- Operational readiness of probe after catalytic converter-
WARNING: This page is about a different car, the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, and 2000 Volkswagen Cabrio. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Display Group 37 - Oxygen Sensor Control (Operational Readiness Of Probe After Catalytic Converter)
- For Evaluation 2 in Fig 1, see EVALUATING DISPLAY GROUP 36, DISPLAY ZONE 1 - OXYGEN SENSOR VOLTAGE, OXYGEN SENSOR AFTER CATALYTIC CONVERTER .
Note on display zone 3:
- The Oxygen sensor control after catalytic converter is the master regulation of the Oxygen sensor control before catalytic converter and serves as a controlling regulation. It corrects slight rich or lean shifts by means of the Oxygen sensor before catalytic converter by holding the Oxygen sensor control before catalytic converter on the upper or lower point for a certain period -t- (dwell period). If the period is in the positive range (e.g. 50 ms) the mixture is moved towards "rich". If the period is in the negative range (e.g. - 50 ms), the mixture is moved towards "lean".
- If the value rises above 200 ms, the exhaust system is leaking.