rev up your engines today I'm gonna show you how to fix a very common problem in
modern cars an oxygen sensor system now all modern cars use a variety of oxygen
sensor technically this is an air fuel ratio sensitive these things screw into
the exhaust system and they measure indirectly what kind of gases are in the
exhaust to make the car run perfectly and not pollute now this particular car has
got four of them on each in this case it's trip too cold to check engine light
is on in this case it's beyond five one he had oxygen sensor heater control
circuit low bank two sensor one the sensors sends feedback to the computer
they can be affected by if your cars running rich lean if you got a bad
catalytic converter if you've got bad fuel there's all kinds of reasons that
they can trip codes for just the sensor this is the Lexus a toyota product and
they have a known problem inside these stupid little sensors is a heater kind
of like your hair dryer heater and that's so that when you start the car
immediately it heats up and it works sufficiently at lower operating
temperatures when you start to come and these stupid heaters inside those
sensors break down all the time on these now the car can run perfectly fine this
thing's running perfectly fine but you can't get your car inspected because
it's got that code for a problem within our pollution system the oxygen sensor
so in the case of this Lexus most logical thing to do is to just change
out that sensor now it's called bank two sensor one whether it's for minor how do
you know which one that is well here's how you tell on any engine this is a v8
so there's two banks Bank 1 and Bank 2 well bank one is the side of the
engine it has the number one cylinder and bank two is the opposite side so in
case of this Lexus the driver side has the number one cylinder so bank number
two is the opposite side the passenger side and the cold goes for bank two
sensor one well sensor one is the sensor before the catalytic converter so it's
the first one off of the exhaust manifold Jack it up and see where it is
this thing is so low to the ground you got a jack it up to get it under it
look at anything we don't want to be squashed so we'll put a jack stand, now we go
under the car you see you really can't see anything cuz all this plastic crap
is in anyway so we gotta take some of the plastic crap out of the way so we
can work on sure we'll take a bunch of these off and you know we go up here we
can see the oxygen sensor right there there's the front one if we go back past
the cat there's the rear one behind a catalytic converter but we're changing
the front one that's in the front now the first thing you have to do is
disconnect the clip and it is a stinker you got a squeeze and pull but
eventually as you can see I've got that and unplugged it is a real stinker these
are one of the worst design plugs on the planet I don't know why Toyota makes
these they're absolute scumbags yeah they're real easy to put together
because they click on but they're almost impossible to get off you just have to
keep squeezing and squeezing until they finally click and snap off now when we
go back to the other end here where the oxygen sensor is you need an oxygen
sensor removing the tool you'll never get it off otherwise the tool itself
just slips over the sensor and it's on there and you put a ratchet on it
there's a better shot where you can see it
there's the wrench and you put a ratchet on that and pull on it there's the
ratchet with a long arm fits on it and you just and it comes off it's loose you
can just get your hand I know spin off you can see it just
spins really you just keep turning it until it comes off there it is we got it
out can you just get your new oxygen sensor and screw it in the hole up it
goes just screws in by hand you spin it in and once it's pinned in you put the
wrench and get it nice and tight there it is it's down inside and now you want
to make it tight cuz you don't want leak and of course fish the line through here
so that you can plug it into the other end and click it in now you can see here
it's a one hand job clicking it in there cause collect they're very easy to put
together they're hellacious take apart but
they're made for building not for taking apart and of course you gotta bolt all
the stupid plastic crap back on to knowing but that's how they make cars
these days and voila we'll just let it down and
take it for a road test down she goes and away we go and as you can see now the
check engine light is off all those lights went off so the next time your
car has a problem with the oxygen sensor system now you know what to do, so if you
never want to miss another one of my new car repair videos, remember to ring that bell