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: Q: transmission shifting

If you are still getting the P0720 code after replacing the sensor then you should verify the wiring connection first to the sensor and also in between the sensor and ECM. Remove the sensor and turn the drive shaft. From...

Q: Q: Death wobble

Worn steering components will definitely contribute to a loose steering feel but usually don't give you a wobble - unless something was left loose and not tightened properly.. A wobble at certain speeds can be caused by: Out of balance...

Q: low gas mileage, bad exhaust smell

Dependin where the exhaust leak is can cause the O2 sensors to not get correct amount of gases in the exhaust and cause the rich running condition. I would suggest having the computer codes pinpoint tests be done to see...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...