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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I'm getting code po171 lean bank 1.

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: Difficult startup especially after sitting off too long

The most common causes of a vehicle having trouble starting are: bad battery failed fuel pump ignition switch no spark present The P0442 code is a code for a large EVAP (evaporative emmission control system) leak....

Q: buying for 22,000.00

That is a very tough question to answer without being able to see the vehicle first hand. That is a lot of miles, but if it was mostly highway miles, that isn't so bad. If it was a lot of...

Q: Q: Service engine light

The service engine light or check engine light coming on in cooler temperature could be you gas cap seal but you would need to have the computer scanned first to see if you have codes in memory of the computer...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.