MASS Module Training
Module 4 Quiz: Vehicle Emissions Inspection, Diagnostic and Repair Information

Question 1 of 5.

Q1. A vehicle failing the emissions test for all monitors not supported (shown as ‘U’ on the VIR) could be caused by:

A recently disconnected battery.
Any stored DTCs being recently cleared.
Entering an incorrect GVWR during the inspection.
A communications failure due to a faulty DLC.

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