How to Avoid Toyota Rough Idle | Fix P0171, P0101 Codes

Simple maintenance to keep your Toyota from poor idle and fix P0171 or P0101 error codes.
Cleaning the throttle body every 30K mileage, cleaning the MAF sensor and replacing air filter.
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[@amilcareschettini5881]

I keep getting a P0101 and replaced the MAF with OEM. Throttle body is clean, and the engine filter is relatively new. My mpg has dropped in my 2018 significantly too....

[@eazidiy]

Please check the harness connector and wire for corrosion too.

[@ac1studios]

So I have a Toyota Corolla 2013 LE and I have a P0101 Code and my car had a K&N filter. I cleaned the mass air flow sensor and code went away for some time and cleaned the engine filter. Now I just mainly get a System too lean bank 1 P0171 code. Had the same cracked hose as you had for the P0171 but still get the code after replacing that hose. How can i fix it?

[@ac1studios]

RPM does fluctuate a bit sometimes.

[@eazidiy]

You may have other issues like fuel pressure or purge valve leaks. I would recommend seeking professional assistance.

[@averybruggeman607]

'PromoSM'

[@eazidiy]

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