2003 Honda Accord Vacuum Leak & O2 Sensor Fix (P0171)

[@dnlmachine4287]

Good video thanks for posting. Every K20 and K24 engine i have ever worked on has a torn intake boot, right at the spot yours was leaking. I suspect they get torn from rough handling during install removal of airbox when servicing air filter. If you cannot get a new or undamaged one - Clean the tear and surrounding area with rubber safe cleaner, apply RTV INSIDE the crack ONLY, wipe excess RTV inside and outside, use Flex Seal type tape to wrap the outside of boot over the tear. Leave in sun or near mild heat to cure. Even electrical tape will work in a pinch. Stay gold

[@goognamgoognw6637]

Check the MAF sensor. If there's a leaf on its grid or a bad electrical signal it could detect less air than there is actually coming out of the air box causing a lean mix. Not a common problem but related.

[@JustLovett0]

Alright, now I’m gonna call you over to my house to find vacuum leaks in my car. Haha

[@TannerTech]

I would love to! Except... I am flying to MIT tonight. Just drive to Boston and I'll fix it lol

[@tommytravistyler]

Great video! Have you ever found the vacuum leak or found the issue?

[@frankmirabelli7440]

Very good video you are persistent

[@Rooey129]

Did you put the old o2 sensor back in or drive for a long time on the new sensor? O2 sensors need to be calibrated to the car which might be why your trim is out, it wont ever be 0 though, usually somewhere between 0-5% as every car is different. Also I would probably put a disclaimer in at 7:36, as doing this on a car with a MAF sensor will destroy it. Accords don't but many cars do and the oil will cover the MAF sensor giving it bad readings.

[@Ricky07070909]

Nice!! Thanks! Subscribed!

[@MultiRafael23]

How many mpg are you getting? I'm getting 22.1 on my accord 2004.

[@Rooey129]

You are so lucky you didnt damage the o2 sensor by crushing the housing. I've seen it a few times, it doesn't take much. 5:33

[@Ihavetruth22]

Another reason to hate these modern fussy crappy cars.

[@macabo]

be sure to use jack stands whenever youre under a car if you like being alive

[@phonotical]

You fix the engine lights by putting some black tape over the light 😂 Coca-Cola!

[@cuneytcomuk4387]

Mechanic says like that

[@hondadays]

Did you ever find the issue??

[@paulrush9166]

So what's the haps on the Honda?

[@crystrezerex2life]

Did you ever figure it out, and correct the p0171 .....I have the same problem 🤷

[@lasersbee]

So.. What ever happened to your Honda's fuel/air problem ???

[@TannerTech]

Not sure, I moved to Boston a few weeks after filming this and my brother has the car now. It may still have this problem. My guess is a dirty fuel injector but who knows

[@mikejmardis]

Check your purge valve and brake booster. Incidentally, the wide band sensor is referred to as an air/fuel ratio sensor. Fuel trims are calculated by subtracting st and lt and you want it to be less than 10. If propane worries you, just use carb cleaner or brake cleaner. Just be well ventilated with brake cleaner as it produces phosgene when burned. I use it all the time and haven’t had any issues. It may not be a bad idea to at least inspect, if not clean, your MAF sensor. Just use the proper cleaner and be sure it is dry before reconnecting. Lastly, did you ever clear your codes after any repairs? PS: this goes without saying, don’t ever get advice from a parts store. PERIOD!!! There may be exceptions to the rule with knowing what they are talking about; but they are just that. Exceptions.

[@nimster64]

What was the issue

[@Silvertheta]

Did you end up figuring out what was wrong with your car and the solution?

[@TannerTech]

Not quite. I moved to Boston a few weeks after making this video and my brother has the car now. Not sure if he has done anything to it

[@Ihavetruth22]

@@TannerTech good move!

[@waleedahmed5505]

My civic si with CAI and skunk2 headers. I also have p0134 error and changed sensor too. Still the issue is rpm drops too low and gets too lean like 27.1 afr when i shift gears. So i assume it is a vacuum leak somewhere

[@TannerTech]

Probably so

[@waleedahmed5505]

@@TannerTech turns out i had a leaking axle seal and that gear oil was everywhere and also my connector was full of it, cleaned it with injector cleaner and now no more code and runs smooth on my old sensor. Damn i bought a new sensor. 😥

[@lotusthe3rd831]

@@waleedahmed5505i have same code and ontop of misfires battery light flashing etc also this is before the pcm flash update. help me its like the car from hell.. i know i have a tear at the breather joint by the intake hose but id like to know aboht this and i replaced the upstream a/f sensor

[@franganghi]

Clean the throttle body and male sure that it moves while accelerating. If it stays open more fuel is add to prevent a stall. No? Anyway good luck. Giovanni, Rome.

[@phonotical]

Was going to say it sounds like a leak, but maybe on a seal, I guess easy enough to test, it wouldn't supprise me if youtube user chrisfix hadn't covered it before he's done just about everything else 😂 Are your tyres ok?

[@amandabogart9127]

He works on cars too!!! Anything you can't do? Haha!!

[@Gazanova85]

I have the same problem with my accord and cant figure it out

[@TannerTech]

Yeah, there are so many things that can lead to a P0171... Good luck!

[@Gazanova85]

@@TannerTech not sure it can be fixed. honda made the problem on purpose

[@Ihavetruth22]

@@TannerTech I hate this code the most. I HATE MODERN CARS!

[@Ihavetruth22]

@@Gazanova85 LOL Excellent !

[@Ihavetruth22]

Call dealerships and have price checks on them for service. local $70 dollar fee. It could be injectors or Fuel press regulator.

[@crystrezerex2life]

A MAF sensor will cause a lean code on both banks ...not just 1

[@LynWeeD]

Replacing the maf sensor will make the code p0171?

[@crystrezerex2life]

@@LynWeeD what do you mean?

[@LynWeeD]

@@crystrezerex2life I meant to type if you replace the faulty maf sensor then will the code p0171 go away? I'm in process about to clean the maf sensor first with maf sensor cleaner...also im going to check the air filter and I just replaced the air intake hose it was cracked but the code remains

[@crystrezerex2life]

@@LynWeeD are you working on an accord? What size engine?

[@LynWeeD]

@@crystrezerex2life yes 2.4

[@fritz2259]

I hope you use jack stands kid it didn't look like it never trust a jack

[@franciscoesparza410]

😂😂😂

[@geesElement]

MIT still couldn’t fix a Honda

[@malcolmjelani3588]

MIT lol, the OTHER ivy league. Study hard in high school kids or you'll wind up having to go to MIT or UPenn. I went to Harvard.

[@user-iz1pf9rp9e]

Muhammed nurudeen

[@MrYega-zq7rz]

What about if fuel trims are negative