How do you troubleshoot a catalytic converter?
- sparkiLv 54 years ago
The oxygen sensor is the basis of the closed-loop control system on a spark-ignited rich-burn engine; however, it is also used for diagnostics.
In vehicles with OLED IX a second oxygen sensor is fitted after the catalytic converter to monitor the O2 levels. The O2 levels are monitored to see the efficiency of the burn process.
The on-board computer makes comparisons between the readings of the two sensors, so you will have to determine:
a) is the computer turned on
b) can it identify both sensors
c) is temperature control operational