A vehicle comes in with the check engine light on. The vehicle is scanned and has transmission ratio error codes for 1st, 2nd, 3rd, and 4th gears (i.e. all forward gears). Technician A says that the problem could be a faulty output shaft speed sensor. Technician B says that the problem could be a faulty transmission front pump. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

The output shaft speed sensor is responsible for sending the transmission control module (TCM) information about the speed of the output shaft. If the output shaft speed sensor is faulty, the TCM will not be able to accurately control the transmission, which could lead to transmission ratio errors.

A Vehicle Comes in with the Check Engine Light On the Vehicle