check engine code P0101

P0101 Mass or Volume Air Flow Circuit Range/Performance Problem

I have a volant cold air intake installed and drove the truck for about three months with no codes. out of no where I get the check engine code P0101. My first thought was that the oiled air fillter probably got the MAF senor dirty so I removed and cleaned the MAF senor with special MAF senor safe cleaner.
I had the code reseted.
Within the following month the code apeared again and then it cleared itself after a hunderd miles.
I decided to upgrade to a dry filter from URD.
I reset the computer again and the code still apears.

Do I need to replace the MAF senor or would installing the URD Calibrator fix the problem?

Im thinking that the MAF is misreading the actual air flow and that the calibrator could fix that.

Any other ideas?
Thanks in advance

 

I just looked up your code. It says it's either a vacuum leak in the intake system, a leak in the PCV system, or a bad MAF.

My guess is it's the first one. I'd see if the manufacturer has any info on this problem, or get a hold of the URD guys and see if they have a fix for it.

 

I'll check the hoses that conect to the intake and make sure theres no leaks or tears.
hope its something simple like that

 

all the hose connections were tight and sealed.
I'll trade the MAF with a friend and ill see if the problem occurs again.

 

I installed a different MAF sensor on my truck and got the same code again. that should rule out the sensor. all the vacuum hoses are nice and tight. I don't know what to do to fix the problem

 

i know its been a while.. any fix on this?? i have gone throught 3 MAFS, replaced vacume hoses... but still get that stupid p0101 code...

 

I had the same code, i just recently just cleaned my sensor, reset my light and after 50 miles, it hasnt come on so far. I will update again if it comes on. The sensor just sits on top of the air intake, and is only held on by 2 screws. Just unhook the wire, unscrew it and pull out the sensor. The sensing bulb on mine was pretty obviously dirty, so i just wiped it off an put it back in. Hope this helps.

 

Check your EFI #2 fuse!

 

I know I'm resurrecting the dead, but what have you guys done to resolve this code?

 

OP, cleaned your MAF lately?

 

Sorry to resurrect this thread....any updates on the P0101 code? My 2008 Tacoma has been throwing it off an on for a month or so....I have a K&N cold air intake, and cleaned/oiled the filter just before the code appeared. I've cleaned the MAF with contact cleaner twice, and reset the computer each time. The code just reappeared yesterday....any ideas? Thanks in advance!

 

I would replace the maf sensor and get rid of the oily K&N

 

Yup, just got the same code.
Tried cleaning MAF sensor, even replaced it. Nothing.
All hoses look fine as well.

I'm running a URD intake on my 4.0L.
Anyone end up fixing this issue?

Gadget from URD just advised making sure filter wasn't installed too far into intake pipe (which it isn't), and all wiring connections are properly intact (which they are)

If anyone has insight please advise

 

Try putting the stock intake setup back on and see of the code returns

 

I wish I could. I sold it years ago. Ran the yrs intake for about 4-5 yrs now.
Maybe I'll check online to see if there are any OEM intakes for less than factor price

 

Well if it was on there for 4-5 yrs nevermind..

Might have a broken wire somewhere along the line

 

Update... I was getting fed up, tried replacing MAF sensor, nothing. Cleaned sensor, nothing. Cleaned connectors, visually inspected hoses, nothing.

Finally fixed: I cleaned throttle body assembly, and re-cleaned the intake filter. I cleared the codes, and this has fixed the issue for 1000kms so far. No returning engine light. Hope this can help someone else

Hood