Motronic MED 17.5
Oxygen Sensor Control
A new feature of the MED 17.5 is the deletion of the
continuous-duty oxygen sensor. Now, a nonlinear
oxygen sensor is installed. The sensor is located
between the close-coupled pre-catalyst and the
underbody catalytic converter.
The function of the continuous-duty pre-cat sensor
has been mapped by the new functions of the engine
control module.These maps are generated by conducting
appropriate tests during engine development.
Advantages:
• Fewer potential sources of fault
• More cost-effective
• Requirements of ULEV are met without
continuous-duty oxygen sensor
• No adjustments needed in customer service or for
exhaust emission inspections
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