Mitsubishi - P0171 Fuel Trim Too Lean - Fault Found - How To DIY - Quick Tech Tips

In this video I diagnose a 2018 Mitsubishi Eclipse Cross which presented with the engine management light on and fault code P0171 Fuel Trim 1 Too Lean stored. I show a quick couple of tests to show how fuel trims can be used to help you find these type of faults.
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Disclaimer:
GerardBurke is a qualified motor technician who has completed modules & courses in manual handling and all aspects of workshop safety. These videos are not intended to be used by anyone who is not trained and or qualified to carry them out.
Due to factors beyond the control of GerardBurke, I cannot guarantee against improper use or unauthorized modifications of this information. GerardBurke assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. GerardBurke recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of GerardBurke, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not GerardBurke.
Exact vehicle details
MITSUBISHI ECLIPSE CROSS YA 1.5L 4B40 MIVEC DOHC 16v Turbo Petrol Direct Inj. 4cyl 110kW 8sp Auto CVT 4dr Wagon FWD 2017 - 2020
2017 2018 2019 2020

[@jgeorges3061]

AWESOME INFORMATION AND GREAT THOUGHT PROCESS THANKS FOR SHARING.

[@GerardBurkeBurkesGarage]

Thanks for the feedback, much appreciated 🤗

[@dancew77]

the high speed scan looks 👌

[@GerardBurkeBurkesGarage]

Yes it is a very nice feature 😉

[@MiracleMAX]

Good quick tip mate.

[@GerardBurkeBurkesGarage]

Thanks mate 😃

[@gemmanaughton3693]

Nice video, thanks

[@patkelly7999]

Great job Gerard👌👍🙏🙂

[@GerardBurkeBurkesGarage]

Thanks Pat 🙏🙏

[@elvisnyakundi]

What if when you press the gas nothing changes but when you release the gas it drops to zero for a second then goes back to 25%?

[@micro61micro]

The real question is what cause that house to collapse 😆.

[@GerardBurkeBurkesGarage]

Oil passing through it making it soft and then failing over time.

[@micro61micro]

@GerardBurkeBurkesGarage that hose was not meant for oil, The actual problem started before that hose.

[@GerardBurkeBurkesGarage]

The video and information are related to how to confirm a fault using these methods and showcased the fuel trim fault. If you would like to share your thought process on crankcase ventilation or this specific design, by all means add the information that you think would be helpful and I can pin that comment. This channel is all about sharing information and I try to compress down the information in my videos to the most relevant in each case.

[@GerardBurkeBurkesGarage]

Relating to oil present in these systems, it is not uncommon for oil vapours to flow through and there is a certain tolerance that is acceptable under manufacturers warranties, of course that is on a case by case bases but in this instance the hose is extremely cheap and it's up to the vehicle owner how much they would like to spend after that.

[@gemmanaughton3693]

Nice video, thanks

[@GerardBurkeBurkesGarage]

Thanks 😃