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P0101 OBD
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nimrag
Obstacle Crusher
Obstacle Crusher


Joined: Nov 30, 2007
Posts: 2378
Location: middle of PHX

PostPosted: Thu May 17, 2018 9:32 pm    Post subject: P0101 OBD Reply with quote

Does anyone get this code? I’ve been getting for several years. It’s random, sometimes I don’t get it for months, but lately, it’s several times per day.

From my research, it’s the MAF circuit.

I switched the MAF sensor with my nieces FJC, she drove over 100 miles without a check engine light.

I have cleaned the air filter(dry filter, no oil) cold air intake. Cleaned the MAF sensor. I plan on replacing the PCV valve, next.

Vehicle info
2007 manual transmission, 87,xxx miles
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glideraz
Baja Champ
Baja Champ


Joined: Jan 18, 2010
Posts: 4007
Location: avondale

PostPosted: Fri May 18, 2018 8:45 am    Post subject: Re: P0101 OBD Reply with quote

It takes a full heating cycle to trip a check engine light that usually 700 to 1000 miles....or you can drive like a bat out of hell.
0 to 60 full throttle
Do that 5times
Then normal acceleration to 60 5 times then repeat 1at step.
That will heat up the cat nice and hot and then all sensors will activate .

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nimrag
Obstacle Crusher
Obstacle Crusher


Joined: Nov 30, 2007
Posts: 2378
Location: middle of PHX

PostPosted: Fri May 18, 2018 11:11 am    Post subject: Re: P0101 OBD Reply with quote

I forgot to add, after I did a drive cycle like your describing I got the same code with my nieces MAF senssor in my FJ.
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toyo22r
Trail Runner
Trail Runner


Joined: Nov 07, 2009
Posts: 584
Location: Goodyear

PostPosted: Fri May 18, 2018 7:00 pm    Post subject: Re: P0101 OBD Reply with quote

FYI - Toyota uses "two trip logic" which means the problem must be detected in 2 consecutive driving cycles before the MIL is illuminated.

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debFJVT
Dusty Truck
Dusty Truck


Joined: Sep 04, 2016
Posts: 44

PostPosted: Sun May 20, 2018 12:08 pm    Post subject: Re: P0101 OBD Reply with quote

nimrag wrote:
Does anyone get this code? I’ve been getting for several years. It’s random, sometimes I don’t get it for months, but lately, it’s several times per day.

From my research, it’s the MAF circuit.

I switched the MAF sensor with my nieces FJC, she drove over 100 miles without a check engine light.

I have cleaned the air filter(dry filter, no oil) cold air intake. Cleaned the MAF sensor. I plan on replacing the PCV valve, next.

Vehicle info
2007 manual transmission, 87,xxx miles

I went through similar, could not find the source till the hose clamp on my CAI (mines TRD) slipped off far enough to generate additional “lean” codes. I ended up replacing hose clamps and several pipe/connectors of the CAI and haven’t had P0101 again.
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nimrag
Obstacle Crusher
Obstacle Crusher


Joined: Nov 30, 2007
Posts: 2378
Location: middle of PHX

PostPosted: Sun May 20, 2018 1:31 pm    Post subject: Re: P0101 OBD Reply with quote

I took the whole intake apart and cleaned it, then re installed it.

Mine is an aFe intake , which is almost exactly the same as the TRD.

I’ll double check all of the connections.
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debFJVT
Dusty Truck
Dusty Truck


Joined: Sep 04, 2016
Posts: 44

PostPosted: Sun May 20, 2018 1:43 pm    Post subject: Re: P0101 OBD Reply with quote

nimrag wrote:
I took the whole intake apart and cleaned it, then re installed it.

Mine is an aFe intake , which is almost exactly the same as the TRD.

I’ll double check all of the connections.

My issue was actually more complex as the TRD pipe had semi-melted from rockcrawling in Moab heat - was no longer round! So was leaking air. Didn’t see it till removing the pipe for a look. Don’t know what AFE components are made of, but if plastic you might want to check the main air pipe under the hose clamps for roundness lol
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nimrag
Obstacle Crusher
Obstacle Crusher


Joined: Nov 30, 2007
Posts: 2378
Location: middle of PHX

PostPosted: Mon Jul 16, 2018 5:07 pm    Post subject: Re: P0101 OBD Reply with quote

I removed the throttle body body and cleaned it. I also found a crack in the small vacuum hose that goes from the intake to the passenger side valve cover. My check engine light hasn’t been on for a couple of weeks now.
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4GaugeSurprise
Obstacle Crusher
Obstacle Crusher


Joined: Jul 16, 2013
Posts: 1971
Location: South Mtn-ish.

PostPosted: Tue Jul 17, 2018 3:04 pm    Post subject: Re: P0101 OBD Reply with quote

nimrag wrote:
I removed the throttle body body and cleaned it. I also found a crack in the small vacuum hose that goes from the intake to the passenger side valve cover. My check engine light hasn’t been on for a couple of weeks now.
CRACK - it get's ya every time.

I've sold cars simply because I was sick of trying to find a tiny vac leak - the American made stuff from the late 70's with miles of leaking tubes. Still have nightmares.

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