While discussing the numbering of HO2S sensors, Technician A says they are identified by their position in relation to the number 1 cylinder and their location relative to the converters. Technician B says HO2S sensors on the same side of the vehicle as the number 1 cylinder have a 1 prefix, and sensors mounted downstream from the converter have a 1 suffix. Who is correct?

A. Technician A
B. Technician B
C. Both A and B
D. Neither A nor B


Answer: A

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