P016B

2017-10-10

Description:

  • Closed Loop Air/Fuel Ratio Control At Limit System Too Rich

Possible Symptoms:

  • Check and clean the mass airflow sensor (MAF)

  • Inspect and replace faulty oxygen sensor(s)

  • Check and repair any vacuum leaks in the intake system

  • Ensure proper fuel pressure and delivery from the fuel pump and injectors

  • Inspect and replace a clogged or malfunctioning catalytic converter

Possible Causes:

  • Faulty oxygen sensor

  • Clogged or dirty fuel injectors

  • Malfunctioning mass air flow sensor

  • Vacuum leak in the intake manifold

  • Faulty fuel pressure regulator

Related Parts:

Possible Solutions:

  • Decreased fuel efficiency

  • Rough idle or stalling

  • Check engine light illuminated

  • Strong smell of fuel from exhaust

  • Lack of power or hesitation during acceleration

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