TOP 5 REASONS WHY YOU'RE GETTING A P0171 AND P0174 LEAN CODE

Check out my other videos:

12 signs your engine is going bad!!
https://www.youtube.com/watch?v=u6ZrsUKwnq0

5 signs your brake system is failing!!
https://www.youtube.com/watch?v=xbYtdH91_so&t=21s

5 signs your alternator is failing!!
https://www.youtube.com/watch?v=qjlw0WYlShI

5 ways to tell your starter going bad!!
Https://www.youtube.com/watch?v=PlDCVvPEhTE

5 signs your suspension is failing!!
https://www.youtube.com/watch?v=x0tyh52rQPE
Visit: http://top5autorepairs.com

TOP 5 REASONS WHY YOU'RE GETTING A P0171 AND P0174 LEAN CODE

NUMBER #1 Vacuum Leaks: A vacuum leaks is noticeable at idle and improve with the foot on the gas. A vacuum leak is unmetered air entering the engine usually caused by a bad gasket, seals, or a vacuum hose. Check around the throttle body, vacuum hose, and intake manifold.

NUMBER #2. Mass Air Flow Sensor: A dirty mass air flow sensor can trigger a lean code. It job is to monitor the incoming air. When the air flow sensor is dirty, it’s reading becomes distorted and trigger a lean code. Check the mass air flow for dirtiness and if it is, use a mass air flow cleaner to clean it.

NUMBER #3 Dirty fuel injectors. A dirty fuel injector will prevent the flow of fuel from being sprayed into the engine. Therefore it will cause a lean code. To fix this problem replace the fuel injectors.

Number #4 Low fuel pressure: A low fuel pressure can be caused by a weak or failing pump, leaky fuel pressure regulator, clogged fuel filter, bad wiring and again dirty fuel injectors.

Number #5 Leaky PCV valve: Check the pcv by removing it and cleaning it with carburetor cleaner. Give it a shake and you should hear it rattle. If you do not hear a rattle, replace the PCV valve.

Additional lean codes not mentioned in top 5.

-faulty oxygen sensor can cuase lean code
-clogged fuel pump
-weak fuel pump
-evap system: charcoal canister, hole in hose, etc...

Видео TOP 5 REASONS WHY YOU'RE GETTING A P0171 AND P0174 LEAN CODE канала Top 5 Auto Repairs