What Does Engine Code P0171 Mean

P0171 Fuel Trim System Too Lean Bank 1

P0171 is a diagnostic trouble code (DTC) that indicates that the fuel trim system is too lean on Bank 1 of the engine. This means that the engine is not getting enough fuel, which can cause a number of problems, including decreased fuel economy, poor performance, and increased emissions.

There are a number of things that can cause P0171, including

A faulty fuel injector
A dirty or clogged fuel filter
A problem with the mass airflow sensor (MAF sensor)
A problem with the oxygen sensor
A problem with the fuel pump
A problem with the fuel pressure regulator

So What Does Engine Code P0171 Mean?

P0171 is the generic OBD-II code for Fuel Trim System Too Lean Bank 1.
This means that the engine is not getting enough fuel to run properly.
Possible causes include:
A bad fuel injector
A clogged fuel filter
A problem with the fuel pump
A problem with the mass air flow sensor
A problem with the oxygen sensor

What Does Engine Code P0171 Mean?

The P0171 code is a generic OBD-II code that indicates that the engine’s fuel system is too lean. This means that the engine is not getting enough fuel to run properly.

Symptoms

There are a number of symptoms that can be associated with the P0171 code, including:

Engine misfire
Poor fuel economy
Engine hesitation
Rough idle
Increased emissions

Causes

There are a number of possible causes for the P0171 code, including:

A faulty fuel injector
A clogged fuel filter
A problem with the fuel pump
A problem with the mass air flow sensor
A problem with the oxygen sensor

Diagnosis

The P0171 code can be diagnosed by a qualified technician using a scan tool. The scan tool will be able to read the code and provide information about the specific problem.

Repair

The P0171 code can be repaired by a qualified technician by addressing the underlying cause of the code. This may involve replacing a faulty fuel injector, cleaning or replacing a clogged fuel filter, replacing the fuel pump, replacing the mass air flow sensor, or replacing the oxygen sensor.

Prevention

There are a few things that you can do to help prevent the P0171 code from occurring, including:

Keeping your fuel tank full
Changing your fuel filter regularly
Inspecting your fuel lines for leaks
Maintaining your engine properly

Conclusion

The P0171 code is a common problem that can cause a number of symptoms. However, it can be diagnosed and repaired by a qualified technician. By following the tips in this article, you can help prevent the P0171 code from occurring.

Also Read: What Does Engine Code P0174 Mean