On an OBD II vehicle, the MIL will turn on when:
A) a condition that could cause emissions levels exceeding 1.5 times the FTP level is detected
B) an input sensor is defective
C) an output sensor is defective
D) all of the above

Question

Quizplus · Accepted Answer

The Malfunction Indicator Lamp (MIL) on an OBD II (On-Board Diagnostics, second generation) vehicle will illuminate for various reasons, including conditions that could cause emissions to exceed 1.5 times the Federal Test Procedure (FTP) standards, as well as when either input or output sensors are found to be defective. This comprehensive approach ensures that any potential issue affecting the vehicle's emissions or performance is promptly indicated to the driver.

On an OBD II Vehicle, the MIL Will Turn on When