In today’s short video we take a look at a 2009 Nissan Maxima with a 3.5l V6 engine. The check engine light is illuminated and there is a trouble code P0171 lean bank 1 code stored in the ECM. Watch as I show you how to quickly diagnose a simple vacuum leak using a low cost diy scan tool!
***********************Tool used in this video!***************************
KINGBOLEN YA200 OBD2 Scanner
*Click the link here to check it out! https://amzn.to/3JIQvRw
*Use coupon code OIM6829U during checkout and save $$!! Offer expires 3/25/23
){kind=link}
I’m an old retired mechanic a vacuum leak would have been the first thing i would have checked for
U just Guess it's a leak
Does the scan tool come with that sexy beast holding it ???
For any that may not know short term measures fuel being used as the engine runs long term measures fuel used over time. The long term can tell you how your engines been running. You want both of these long and short to be around 0 or – or + 10 percent is okay as well. If it’s a high number in the pluses it’s running lean if it’s really low in negatives it’s running rich. Plus means hardly any fuels being used and negative means lots of fuel being taken. With a vacuum leak that’s air not being red by the MAF sensor so the computer dose not to now how much air has entered the engine with too much air and not enough gas you will have a lean condition of not enough fuel for the air inside the engine. The opposite can happen as well where you have too much fuel for the air inside the engine and not all the fuel gets burned you should be able to see that on the oxygen sensors.
Long Term is the window of time the adaptive memory dictates the fuel trim, Short Term is live data calculating to learn the parameters for the adaptive memory to update the Long Term. The O2 sensor signals lean below .45 volts & rich above .45. The Engine Controller only cares about that threshold & uses that to determine fuel trim. .. in other words the computer calculates the % of time that the O2 sensor is past the threshold of .45 volts & does that each time the threshold is crossed.
Paid $28 at Costco, over a decade ago. Never saw them again. Still works!
Hay men haven't see your new video
What are the symptoms?
Listen for Sucking Chest Wound sound
Lean doesn't equal a rough idle, scanner was useless.
Crappy Nissan even scrappier scanner!
We're you get that from
That's a handy little unit. What some people can't seem to understand is that you can have the best scanner in the world, but if you don't know what to do with the information it provides, it's ineffective. This tool in the hands of somebody who knows how to use it is pretty powerful.
Does it have a abs function
Love those easy ones
Short fuel trim +25<< excess air>>
Was just saying to myself I wish you posted more lol
I have the one, and it still works well after one year.
lol didn't need the scan tool for that one. Just listen. Also, my 14 challenger runs better with the light on than it does with the light off lel.
Can't wait to get rid of that piece of shit for a carburetted beauty.