A maximum reading of _______ parts per million (PPM) of NOx under loaded driving conditions generally means that the vehicle will pass an enhanced I/M roller test.
A. 2,000
B. 500
C. 100
D. 1,000
A maximum reading of 1,000 parts per million (PPM) of NOx under loaded driving conditions generally means that the vehicle will pass an enhanced I/M roller test.
