The O₂ sensors in this OBD II system are sending a voltage signal as shown. What conclusion can be made about the catalytic converter? A) The CAT is not working correctly B) The CAT is working correctly C) The engine is not running, so the CAT is not functioning D) Not enough information

Question

Quizplus · Accepted Answer

The voltage signal from the O₂ sensors should oscillate between 0.1V and 0.9V. However, the graph shows a constant voltage near 0.9V, which indicates that the catalytic converter is not properly reducing the emissions and needs to be checked.

The O2 Sensors in This OBD II System Are Sending

The O₂ Sensors in This OBD II System Are Sending