P0173
Fuel Trim Malfunction Bank 2
Generic code
Fuel and Air Metering
High severity
Hard repair
Free on OBD DashX
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What P0173 means
- 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
Free on OBD DashX
P0173 on OBD DashX
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