Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Oxygen Sensor Monitoring

Oxygen Sensor Monitoring

The oxygen sensors are monitored for:

- Operational readiness
- Connectivity
- Short circuit to B+
- Short circuit to ground
- Open circuit
- Aging of oxygen sensors via the control frequency and control position

Monitoring of Sensor Aging
Contamination or aging of the oxygen sensor affects the sensor voltage or period duration of the sensor signal and therefore has a negative influence on emission values.