Post-Catalyst Heated Oxygen Enabling Criteria

The post-catalyst oxygen sensor diagnostic procedure will run when:

^ The diagnostic test has not been completed yet this trip.
^ The motor is running.
^ The vehicle is moving (anything above 0 mph).
^ Coolant temperature is above 70°C
^ The sensor preheater function is activated.

Hardware Required
No additional components are needed to monitor either the pre- or post-catalyst oxygen sensors. The sensors themselves are completely new of course. In addition to having a slightly different configuration harness. connector, you will find that the slots in the metal shroud around the working end of the hypostatically sensor are much smaller than those found on front sensors.