How to Diagnose Code P0171-P0174 on a Chevy Silverado 2500 HD

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How to Diagnose Code P0171-P0174 on a Chevy Silverado 2500 HD

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Brian Eslick from How to Automotive www.howtoautomo... takes you step-by-step through the process of diagnosing code P0171-P0174 lean bank 1 and 2 on a Chevy Silverado 2500 HD.
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Пікірлер: 44

@jimwalenciak2054 3 жыл бұрын

You gave a very understandable view of what fuel trims indicate and how they should react. Couple more of these and it’s possible I’ll “get it”. Thanks so much.

@Flexyourmemes Жыл бұрын

Thank you. Trying to narrow my lean on banks 1 and 2 codes down

@eddiewyant5791 Жыл бұрын

This solved my bank 1 and bank 2 lean issue. I had the cracked PCV elbow. Thank you!

@HowtoAutomotive Жыл бұрын

Awesome glad the video was helpful. Thank you for watching!

@junkyardcustom 2 жыл бұрын

Awesome informative found my problem in less than a minute after watching this. Thank you.

@luigigonzalez5062 4 жыл бұрын

Nice, quick and easy. Great diagnostic skills

@HowtoAutomotive 4 жыл бұрын

Luigi Gonzalez thank you!

@billyyoder8171 4 жыл бұрын

Thank you Brian. Good job. Have a blessed and safe week.

@terishuler6105 4 жыл бұрын

You are a great teacher. Thank you for taking the time to share your knowledge.

@HowtoAutomotive 4 жыл бұрын

Teri Shuler thank you and thank you for watching!

@FordTechMakuloco 4 жыл бұрын

You know, your videos are really good!

@HowtoAutomotive 4 жыл бұрын

FordTechMakuloco thank you Brian! I think the same about your videos. 👍

@geraldbermudez715 2 жыл бұрын

Excellant to the point and simple. Very helpful.

@on-site4094 4 жыл бұрын

That bladder comes in handy great video

@wyattoneable 4 жыл бұрын

Hey a domestic. Nice one Brian. I'm a long time owner of Chevy's throughout the years so you had my attention!

@HowtoAutomotive 4 жыл бұрын

wyattoneable Wyatt hopefully your Chevy runs forever and you don’t need to use the skills. 👍

@frenchiesfrankieandhenry 4 ай бұрын

I usually just use some carburetor cleaner and I spray it around the intake strategically to see if the engine RPMs go up. If it does you know that you have a vacuum leak and it's easy to find without all the stuff that he had

@tinomartinez7208 5 ай бұрын

Thanks for you time Me ayudó mucho 😮

@paulwatson1507 2 жыл бұрын

Thanks for putting this out there.

@HowtoAutomotive 2 жыл бұрын

Thank you for watching!

@sergiocarrillo9190 4 жыл бұрын

Thanks brother for you're mind and wisdom. :)

@HowtoAutomotive 4 жыл бұрын

Sergio Carrillo thank you for watching!

@sethh8365 3 жыл бұрын

Beautiful video man. Helped a ton. Thank you

@GibbsLD395 10 ай бұрын

I'm looking at quite a few codes on mine and these are some of them so I'll make sure to look at the hose. However my exhaust manifold has two broken of bolts would cold care seeping from there cause this as well?

@danieldileo5706 9 ай бұрын

Fuel trim uses your O2 sensors to read the content of the mixture, if there is an exhaust leak, especially a large one, it can throw off the readings that the O2 sensors get.

@fireboy5043 4 ай бұрын

Thanks Bro Great Vid 👍🏽

@Usmanthemecano 4 жыл бұрын

Classic diag! Waiting for an EVAP diag

@BTom16 Жыл бұрын

Excellent. 👍

@410AutoTech 4 жыл бұрын

Awesome find brian!! Great find !! Wonder if it just worn over time or if someone was working around it and accidentally damaged it at one time.

@RustbeltMechanic 4 жыл бұрын

Great simple video that covers a lot of variables. I like that intake bladder setup. It looks a lot nicer than the kit of different sized cups and clamps that we generally used. Do you use it for boost leaks as well?

@HowtoAutomotive 4 жыл бұрын

Rustbelt Mechanic you can use it for boost leaks I believe Redline make a specific smoke machine and bladder set up for high pressure systems.

@andyr2965 2 жыл бұрын

wat ahould long term feul trim normally be at? mine r sitting at 17-19.

@chekelley6861 4 жыл бұрын

👍🏽

@makowskid8 Жыл бұрын

Happens to my 19 everytime i hit snow or water

@20tea 3 жыл бұрын

I'm dying, can't find the cause to mine. Changed to new injectors and new intake manifold gasket. All my vac hoses are good. Torqued my intake gasket to spec, so maybe I'll throw in my old injectors to see if that was it. ??? Same lean codes...

@N.I.Xhardcore 8 ай бұрын

Fuel pump

@20tea 8 ай бұрын

Turned out it was the new injectors. Some just didn't work properly. Got a good tested set of injectors and all went away.

@TheDrewker 4 жыл бұрын

I have both of these codes on my 5.3L '06 Silverado 1500 LT. Also had one for the evap solenoid (P0449 if memory serves), but I replaced that and the code didn't come back. For the lean codes, one shop suggested that it was probably the intake manifold gaskets. I'm not a mechanic but it seemed like a good possibility, really thought that would do it. So my brother and I replaced those this past weekend. Seems to run just a tiny bit better, but the codes keep coming back. The truck has "drivability" issues - takes 2-3 tries to start when cold, gets poor mileage, loses power going up hills, etc. Luckily I live and work with my brother so I've been able to avoid driving it for the most part, but it can't stay sidelined forever. Need to get this figured out. As long as you're just cruising and don't need to go over 3500 RPM or so, it basically runs fine, but gets bad mileage. I bought a cheap OBDII scanner and started learning a little bit about how to read fuel trims. Most KZfaq videos with these codes end up being vacuum leaks (seems like all of them are), but I'm starting to think it's my fuel pump or something in the fuel delivery system. Of course, my truck is one of the first few models that had the fuel pump/filter _inside the tank,_ so that's a whole new can of worms. Thanks for the video, would greatly appreciate if you have any input on mine.

@michaelsterling2276 2 жыл бұрын

Hey just curious ever found the problem?

@TheDrewker 2 жыл бұрын

@@michaelsterling2276 Yep... Ended up being clogged catalytic converters. Weird because it wasn't throwing any cat codes until I tried everything else. Also replaced O2 sensors. Runs good now, but wasn't cheap.

@michaelsterling2276 2 жыл бұрын

@@TheDrewker ah yeah makes sense, I have the 4.8 and I believe it has dirty fuel injectors and the fuel pump is going bad, it has been sitting a couple of years. Thanks for responding!