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Home >> Opel >> 1978 >> Opel 4D Sedan, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emissions System - Catalytic Converters >> Operation >> THERMO Sensor & THERMO Controller
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THERMO Sensor & THERMO Controller

Thermo sensor is inserted into converter to determine catalytic converter operating temperatures. The thermo sensor sends varying electrical signals to thermo controller. At about 1350°F (732°C), the thermo controller sends an on signal to energize vacuum switching valve. At 1830°F (999°C), the thermo controller turns on warning lamp and buzzer.

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