Skip the auto shop - Our mechanics make house calls

Q: I'm getting code po171 lean bank 1.

asked by on

I replaced 02 sensor bank 1 sensor 1,fuel filter,air filter,pcv,mass air spark plugs,replaced intake gasket . Truck ran go for about 20 miles then started to run rough no power.running same way before all new parts installed.

My car has 20500 miles.
My car has an automatic transmission.

There vehicles are known for the intake manifold warping and having fuel injector problems at higher miles. The fuel trims can be checked while the engine is warm and spraying around the intake manifold gaskets to see if the trims jump around once brake cleaner or starting fluid is sprayed around the seals. Consider hiring an experienced technician equipped with a professional scan tool like one from YourMechanic who can come out and run a few tests on your lean condition to offer a more personal diagnosis.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I changed my spark plugs due to p0300 for 2013 infiti

Hello, thank you for writing in. The vehicle originally gave you a code for a misfire. It could have been caused by the spark plugs or a fuel problem. The second code pertains to a low fuel pressure being detected....

Q: Alignment off on 2004 GMC Envoy

Hello. Sometimes hitting a curb or running over a pothole can cause the alignment to go out in a car. Also, if you have a worn suspension it will cause the alignment to go out as well. If this is...

Q: Why does the check engine light keep coming back on?

The check engine light comes on and stays on if the onboard computer sees a problem that could cause an increase in emissions or a problem with its systems. After looking at most of the possible codes or issues that...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...