Probe V6-153 2.5L DOHC (1994)
must heat up to approximately 572 - 752°F (300 - 400°C).
CONSTRUCTION
Sensors incorporate a platinum coated ceramic zirconia tube which generates voltage if there is a difference in oxygen concentration between
inside (exhaust gas) and outside (fresh air) of tube. To reach operating temperature more quickly, sensors are equipped with heating elements.
An electrical heating element helps warm up the sensor to operating temperature more quickly and maintains its temperature during times when the
sensor may cool off, such as prolonged idle or deceleration. Heating elements are self-regulating PTC (positive temperature coefficient) heaters.
When cold, resistance is low. As the elements warm up resistance increases, reducing current until a steady state of temperature equilibrium is
reached. Elements get battery power at one terminal from the main relay. The other terminal is connected directly to ground. The heater operates
continuously while the ignition is ON.
