Question

when the oxygen sensor reaches its operating temperature, around __________, it sends an output voltage to the control unit to signal whether the mixture is richer or leaner than a lambda value of 1. a. 350°f b. 400°f c. 600°f d. 750°f

Explanation:

Oxygen sensors typically require a certain operating temperature to function accurately. A temperature of around \( 750^{\circ}F \) is within the range where the sensor can effectively send the appropriate voltage signal to the control unit regarding the air - fuel mixture (whether it is richer or leaner than a lambda value of 1). Temperatures like \( 350^{\circ}F \) and \( 400^{\circ}F \) are too low for the sensor to reach its optimal working state for this specific function. While \( 600^{\circ}F \) is higher than the first two options, \( 750^{\circ}F \) is the more commonly cited operating temperature range for oxygen sensors in this context.

Answer:

d. \( 750^{\circ}F \)