Service instruction

The internal resistance of the heating element of the oxygen sensor after catalytic converter can be measured (with disconnected/removed sensor). In the event of a fault, a resistance greater than 100 ohms can be measured between pin (+12 V) and pin (ground) when the sensor is cold (less than 50 °C).

• Do not allow plug connection to come into contact with cleaning agents or solvents, since the oxygen sensor can be destroyed as a result.