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An OBD-II vehicle fails an emission test with high CO and HC emissions. Technician A says that the cause may be low fuel pressure. Technician B says the cause may be a restricted return line on the fuel supply system. Who is correct?

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We have that the of the two technicians the Technician with the right diagnosis is

  • Technician B is right
  • Option B

From the question we are told

  • An OBD-II vehicle fails an emission test with high CO and HC emissions. Technician A says that the cause may be low fuel pressure.
  • Technician B says the cause may be a restricted return line on the fuel supply system.
  • Who is correct?

Technician A or B

Generally  Technician B is right due to the fact a confined return line in the gasoline furnish machine ought to motive a non-stop excessive oxygen (02) sensor signal,

which is from a Rich Exhaust or low oxygen content material in the exhaust ensuing in excessive HC and CO.

Hence,Technician A is incorrect due to the fact low gas stress will now not motive HIGH CO and HC emissions, alternatively it ought to motive low CO  HC emissions.

Hence,

Technician be is right

Option B

For more information on Technician visit

https://brainly.com/question/16517842

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