P0172 And P0175 What to Look For
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- čas přidán 30. 07. 2024
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Today we are talking about why you might be getting a P0171 and or P0175 engine code. These are codes telling you that the engine is running rich. There is many reasons for this and just not related to a couple things. If your air filter is dirty could make the motor run rich, if you the Maf sensor is dirty this will give false readings and trick the Pcm into running rich. If you have a fuel regulator that is faulty this can make the motor run rich. Other variables can be faulty fuel injectors that are leaking fuel will cause a rich condition.
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![MAF and Wideband O2 Sensor Testing for a P0172 [Rich Condition]](http://i.ytimg.com/vi/_z6HoW4OiD8/mqdefault.jpg)
![MAF and Wideband O2 Sensor Testing for a P0172 [Rich Condition]](/img/tr.png)
These "what to look for" videos are great, thank u sir👍
This video is exactly what I needed. I'm betting air filter on my kids car. Keep up the good work! Thank you!
Very good information i noticed my lexus has been running a little off on idle occasionally not to much performance loss to where its noticeable but i can tell that the engine is not smooth or happy got a p0175 and p0172 i monitored my 02s and ignition timing also checked for misfires on my snapon scanner didn't notice anything concerning or off i have an extra set of oem maf sensors from another ls460 i had will look over my fuel lines n pressure regulators and inspect the intake n fuel in general air filters were changed not long ago so dont think my air filters are the problem
Have a 2018 Subaru Outback 3.6r and the above codes were set. Also, the abs light and Brake light was on. The Check engine light was on too.
The EYE Sight light was on too.
Cleaned the mass airflow sensor.
All lights still on. Finally removed the battery plus and minus connections, cleaned them realty well and all lights went off , car back to normal.
Quirky Subaru!!
Same lights came on mine today , I just relaxed my battery yesterday, I might need to clean the terminals and apply that jelly stuff on the cables ?
His last segment applies to me. I put another valve cover gasket on but my scan tool is saying now it's running rich instead of lean and I can't figure out what's causing it. It wasn't doing that before.
I just changed out my valve cover gaskets on my 2004 Silverado 4.8, can you tell me more about what happened when you replaced yours, what do you mean they rolled?
My 04 4runner o2 sensors aren't reading any voltage,getting both of these codes, both sensors have been replaced.
I have an 04 crown Vic put a cold air intake on it through code saying I was running too lean went back to stock now says it's running too rich po172 and 175 I've replaced the maf a couple times help
have a dodge challenger 2012 the monitor is telling me that my engine is lean, and the other side is too rich, my car won't stay on what would be the cost for some one to fix such a problem. Ball Park figure. would you think? Car has been sitting in my garage for 4 years i turn it off and on but it doesn't want to stay on any help
Change the 02 sensor
Looks like Jerry has calmed down a bit after his rant video....lol.....
Got a suburban with afm running rich -17 bank 2 -8 bank 1 on long term fuel trim , on 7 day of my emissions cycle it pulls po430 can't pass emissions that's the only code it has ever pulled
I pulled the line off my fuel regulate my car turned off ?
I have P0172 code on my 2001 Dodge Durango 4.7 SLT V8 I changed my MAF sensor and still have the check engine on it went out then came back on and suggestions would be great im getting the same P0172 code again
I’m seeing people have success cleaning fuel injectors
My truck seems like the ignition is sticking and whatever is causing that to happen , it’s causing me to have rich bank one and 2 , when I turn the key on to start it it won’t start just sits and cranks when I turn the key back off real fast cause I don’t wanna destroy my starter., it’s still trying to crank , then I’ll turn the key back in and off again and it’ll strip , then in order to start it I give it a lil gas and it starts , and so far I’ve change the air flow max sensor the camshaft sensor the oil pressure sensor and put new plug wires and plugs on it I’ll check the oil filter turn out the oil filter but the air filter and it was good I wonder what’s causing this to run Ridge bank one and two in for my ignition to be sticking like it does
I have the same problem! Could it be the injectors?
@@marcotrejo2589 I dunno it could be so many dif things
@@marcotrejo2589 just check all the simple things first.
I have the exact same issues with my '02 Explorer 4.6. V8...what was wrong with your vehicle after all?? Thanks in advance...
I tried unplugging the mass airflow sensor while the truck was running and it dropped an RPM but came right back up and stayed running just fine now I was told it would run really rough if it was a bad mass airflow sensor. What are your thoughts on that?
probably not it goes to default value
Another great example of how to troubleshoot (no to the parts cannon)
will hopefully give people some ideas on what to look for
Idk why my truck have hard shift 1-2
What if your LT and ST fuel trims are reading zero on 2013 Explorer 3.5L?
zero is good if 02 are switching
I cleaned the MAF sensor and acv sensor & checked for vacuum leaks and none I don’t know what else ? Maybe oxygen sensor or a fuel pump?
Same deal for my LR3, did you ever figure it out?
@@MrAndyroo25 I replaced the iacv and it is working just fine and replaced a vacuum hose
@@staticjdm2777 what's the iacv? I have same issue p0175 sometimes random p0430 and po420 but after spark plugs a d 02 sensors p0175 mainly and every si often po430 pops up
@@picturemerollin21401 iacv is the idle air control valve that’s placed on the bottom right side of your throttle body. It should have 3 screws in it and pretty if that fails then your engine will hesitate and cause rough idle.
Great vid ,,,But what to do if I only have just a P0175 ?
Clean the maf sensor or replace if damaged
What if you have no codes but tons of black soot at exhaust pipe
Hey just wanted to mention and again this is very positive corrective criticism but if you look at the size of your filter with the pre-screen or cover over it. Just looking right away I would imagine a rich code because I don't think you have enough are you can have the biggest intake pipe in the biggest throttle body xcetera but if that air filter is too small and or restricted its hundred percent going to be rich. Put a bigger k&n or whatever style filter you want I guarantee besides not being rich you'll see more power and more efficiency
Engine never had that code, viewer requested video. Air filter is fine
THAT MAKES ALOT OF SENSE
Will it make the car shut off
I believe it would
I get the same code but my truck in the morning it cranks a couple times before turning on. Could it be the fuel injectors?
Idk I’m planning to get one do you think it’s fuel injector?
That’s a fuel pressure issue. It’s not holding its prime. Either you have a leaking injector, bad regulator or pump.
P172 and p175 still rich after changing maf amd map sensor where to look after those amd the air filter got change
2007 Lexus IS350. Threw codes P0172 AND p0175. It was the plug into the MAF that wasn't fully seated.
Got a Cadillac. Mine threw the exact same codes today. Car has been running rough lately. Going in the shop tomorrow.
I’m dealing with the po175 code in Cadillac Escalade
@@juliobello4561 I got my caddy fixed a couple of weeks ago.. had PO172 and P0175
@@nategotti76ify by chance do you know what was wrong with yours. Because so far i swap the maf and the caddy has brand new cats.
@@juliobello4561 I had mass air flow sensor replaced and some other canister replaced
I have a 05 jeep grand Cherokee 4.7 new engine all new sensors all of them. new air filter and new pcm. 6 k on the motor been messing with it since I put it in.
👍👍👍
Needs to breathe.. needs more air. Besides timing that's a whole other issue
I’m just tripping off a Chevy motor in a jeep