P0171 Code System too lean Bank 1 Diagnosed and Resolved | Toyota Corolla

I explained how I diagnosed and fixed P0171 code for my 2010 Toyota Corolla for just $2.
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What does the P0171 code mean?
A Code P0171 or system too lean bank 1 means either too much oxygen or too little fuel in the exhaust. This is a ‘lean’ condition or a ‘low fuel trim’ code.
The P0171 OBD-II code indicates that the fuel system on the first bank of the engine is weak or that a vacuum leak exists near this side of the engine. A lean state happens when the engine receives either too little or too much fuel.
What causes a P0171 code?
Some possible causes of a P0171 engine code are:
Vacuum leak
Weak fuel pump
Broken fuel pressure regulator
Blocked fuel filter
Faulty powertrain control module
Defective injectors
Faulty oxygen sensors
Clogged catalytic converter
Problems with the mass airflow sensor

[@saulyanes9147]

Thank you for your video,that was very helpful for me. I found a broken hose,that was the code in my car.God bless you all who load up your videos

[@eazidiy]

You are welcome. Thank you for the positive feedback.

[@talanorn1286]

Did u get it fixed

[@I_am_Jawad]

The changed hose is called, "Fuel Vapor Feed hose"

[@eazidiy]

You are correct. Thanks

[@MarioSays713]

I have the same car but i experience rough idle from the moment car is on. I think my issue is the pcv valve stuck open. Im losing a lot of oil too. My tmobile sync up picked up the p0171 one day my car stalled. Thats how i know. It stalled while being idle for 10-20 minutes

[@eazidiy]

You definitely have a huge vacuum leak if the car stalled. Please get some professional help

[@MarioSays713]

@@eazidiy it stalled after 20-30 minutes of idle

[@DJJamOfThaDose]

Time to get some new Hose🎶🔊 Great video 👊🏼

[@eazidiy]

Thank you!

[@usa-thienuongtrenat8292]

Thanks you so much!👍👍👍

[@eazidiy]

You are welcome

[@phat2k2accord]

For anyone with this code keep in mind it can be the MAF, fuel filter or pressure regulator also.
- Unplug the MAF with the vehicle running, if it dies the sensor is good.
- you will need to move on to fuel pressure reading. You can rent/loaner a fuel psi tester kit at most auto parts stores.
With the vehicle running the fuel psi should be above 44psi. If not change the fuel filter, pressure regulator (in fuel pump assembly and the pump strainer.

[@eazidiy]

I appreciate your helpful response. Thank you

[@frankcantu1144]

What about a bad upstream 02 sensor?

[@eazidiy]

@frankcantu1144 ua-cam.com/video/zq_ivpvyqX8/v-deo.html

[@leonardmayer2362]

Where do you buy another vacuum tube?

[@eazidiy]

Autoparts store. I got mine from Autozone.

[@brianthomas6956]

Thanks I will look

[@eazidiy]

Alright, you are welcome

[@MrHeroe27]

Hi, congratulations for your videos they are too nice. I have a question I need LED 9005 for Higb Beam, witchs you recommends? Corolla 2010 LE

[@eazidiy]

Hi, do your Corolla have daylight running on the high beam?

[@eazidiy]

1. www.auxito.com/collections/9005-led-headlight-bulb/products/9005-led-headlight-bulb-80w-16000-lumen?rq=yr_2010~mk_Toyota~md_Corolla~tm_~ml_High%20Beam%20-%20Off-road%20Use (Use promo code EAZIDIY) for 15% off.
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[@eazidiy]

If your corolla has DRL with the high beam, the LED lights will flickers. You will have to buy anti-flicker canbus adapter.
www.lasfit.com/products/lasfit-2x-9006-9005-led-headlight-kit-canbus-resistor-anti-flicker-canceller-capacitor?_pos=2&_sid=b0011dce3&_ss=r (code EAZIDIY15 and get 15% off)
or
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[@MrHeroe27]

@@eazidiy Thanks

[@eazidiy]

You are welcome

[@andytipton8146]

U never showed the result of the fix

[@eazidiy]

Hi, my engine runs normal after replacing the pvc hose. I don't have a check engine light on my dash but I have a portable scanner that picked the P0171 code up.

[@chlatepdng]

Does the code still Come up after replacing

[@eazidiy]

No! The code was gone

[@user-we5mi6zl2s]

Unmeasured air.

[@eazidiy]

You are correct

[@user-we5mi6zl2s]

@eazidiy high vacuum at idle, short term fuel trim should be compensating for the unmeasured air l think.

[@dyardsale5475]

cool

[@eazidiy]

Thanks

[@pragyanpokhrel2157]

Not much knowledge about repairing, that much crack wont do anything

[@eazidiy]

Cracks in tubes will cause air to enter the vacuum lines especially when the tubes are hot.