Code P0171?

Code P0171 is for lean exhaust condition. This is common when the engine is misfiring, I would do a tune up with OEM spark plugs and then clear the codes. Also we can check for a vacuum leak, please follow this guide when the engine is cold only. I would also do the ignition coils which is common as well. Check out the guides below to see how the job is done.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Check out the images (Below). Let us know what happens and please upload pictures or videos of the problem.

Recommended Spark Plugs: Denso MadeSK20R11 or NGK Made IFR6A11

Gap .................... 1.0 - 1.1 mm (0.039 - 0.043 in)

Torque .................... 19 Nm (14 lb-ft)

This guide can help walk you through the job:

https://www.2carpros.com/articles/how-to-change-spark-plugs

Let us know what happens and please upload pictures or videos of the problem.

Hello, I just wanted to jump in. P0171 is for running too lean. Posible problems are vacuum leaks, low fuel pressure, or faulty mass air flow. Can you provide a freeze frame to see when the light was triggered? If it is in idle then I would suspect a vacuum leak. If it set during cruising speeds, I would look at the mass air flow sensor as a possible fault.