P0173

2017-10-10

Description:

  • The fault code P0173 indicates that there is a malfunction in the fuel trim for bank 2. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Poor fuel economy

  • Rough idle or stalling

  • Hesitation during acceleration

  • Reduced engine power

Possible Causes:

  • Faulty oxygen sensor

  • Intake air leaks

  • Faulty fuel injectors

  • Dirty or clogged fuel filter

  • Malfunctioning fuel pressure regulator

  • Faulty engine coolant temperature sensor

  • Malfunctioning mass airflow sensor

  • Low fuel pressure

Related Parts:

  • Fuel Injection System: Fuel injection system controls the amount of fuel to be delivered through the fuel injectors. Problems lead to engine misfire, engine stalling

Possible Solutions:

  • Replace the oxygen sensor

  • Inspect and repair any intake air leaks

  • Replace any faulty fuel injectors

  • Replace the fuel filter or clean it if necessary

  • Replace the fuel pressure regulator

  • Replace the engine coolant temperature sensor

  • Replace the mass airflow sensor if necessary

  • Inspect and repair any issues with the fuel system to ensure proper fuel pressure

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