P0171 fault code

[bronsin]

How do you fix code P0171?
You can usually fix P0171 using the following steps:
Replace the fuel pump or fuel filter.
Change the fuel pressure regulator.
Replace the powertrain control module.
Change one or more injectors.
Replace one or more oxygen sensors.
Change the mass airflow sensor.
Repair vacuum leak

[A_scrace]

Originally Posted by bronsin

How do you fix code P0171?
You can usually fix P0171 using the following steps:
Replace the fuel pump or fuel filter.
Change the fuel pressure regulator.
Replace the powertrain control module.
Change one or more injectors.
Replace one or more oxygen sensors.
Change the mass airflow sensor.
Repair vacuum leak

There is no fuel filter on my model also have replaced all 4 injectors and maf sensor along with both oxygen sensors.

[bronsin]

Originally Posted by A_scrace

There is no fuel filter on my model also have replaced all 4 injectors and maf sensor along with both oxygen sensors.

No fuel filter? Are you sure?

I’m guessing you have a vacuum leak. Have you consulted Scotty on YouTube? He describes a procedure for locating vacuum leaks. I think it involves spraying something like WD-40 on it around the vacuum lines of the engine and listening for RPM increase. If it increases when you spray It someplace there’s your leak