Question about 2005 Volvo XC-90 2.5

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My car has a code po101 and I replaced it already but the problem still there and the car feels like it is going to die in a idle

The maf sensot was replaced and the code was erased with a snap on scanner but it comes back

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The problem could be something that is causing the maf to throw a code

Posted on Dec 11, 2012


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SOURCE: MAF needs cleaning 2000 volvo s80

My 2001 S80 was doing the same thing. I took it to the local Volvo dealer and they did a software upgrade at no charge. Purrs like a kitten now.

Posted on Oct 09, 2012

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Po101 code

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. Check for air leaks on or around any intake pipework using a good spraying of carb cleaner, if the engine surges then that's the leak. Check wiring to Maf and if the inside is dirty, again use carb cleaner liberally...NOTE: do not use Wd40... If the code comes back, it may be necessary to replaced the mass air flow sensor.

Jun 04, 2014 | 2000 BMW 3 Series

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Po101 code

P0101 is a mass air sensor code - problem is a 2002 trailblazer doesn't have a mass air - you must have the wrong code.

Jan 15, 2014 | 2002 Chevrolet TrailBlazer

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1994 Oldsmobile Bravada dies at stoplights, just changed fuel pump/filter and egr valve.Appriciate any help. thanks

check for vacuum leaks. You can do this with a can of carb spray but please be careful as it is flammable! if the ignition wires are leaking and you hit them with carb spray you will start the engine on fire!

The safer alternative is to have the engine "smoked" for vacuum leaks. This is done with a smoker. Any place that is leaking you will see smoke.

A trained ear will also be able to hear a leak.

If no leaks are found try unplugging the MAF sensor. Is is in the air tube next to the air filter box. If performance improves try cleaning it with some MAF sensor cleaner. If that doesn't work than you may need to replace it.

Feb 08, 2012 | Cars & Trucks

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Codes PO440 and PO101


P0101 = Mass Air Flow (MAF) Sensor Performance
P0440 = Evaporative Emission (EVAP) System

I have had this problem before with trying to get my cars inspected. The easiest way I can suggest, is to bring it to Autozone or Advanced Auto Parts, and have them clear all your codes. Then put about 100 miles on the car of daily driving and bring it back to the same place to get it inspected. They should reinspect for no charge if you already paid for it.

I have noticed my check engine light going on when using the cheapest gas. Maybe try running a tank of the best stuff in there. At most, at least you will be cleaning your engine, and you will notice performance and gas mileage increases as well.

I hope this helps!


Dec 29, 2011 | 1999 Oldsmobile Silhouette

1 Answer

2001 bonneville po101 maf code Replaced MAF ,MAP (came apart upon removal, pcv (clooged),intake man & gasket (it was cracked),cleaned TB, Cleared the codes.After driving 15 min had a few stutters...

No reflash. Check for vacuum leaks, clear the code. Let the pcm relearn the new sensors. Also check the connectors on the maf for bent pins or disloged pin sockets. Check wiring to make sure no insulation or other damage.

Jul 08, 2017 | 2001 Pontiac Bonneville

1 Answer

Had codepo101 , replaced MAF sensor, cleaned air filter. ran it fora couple miles , service engine light came back on . code po101 back. any ideas??

First make sure the air filter is new or at least clean. If you are using an aftermarket enhancement air filter (like K&N) make sure it isn't over-oiled (the oil will affect the sensors in the MAF) (mass air flow), and contaminate the reading of air volume going to the engine. If the ECM can't monitor or regulate the air flow it will set this code and ignore the input form the MAF. In some cases the MAF wiring was to blame, bad connections, or corrosion.

Jan 29, 2011 | Chevrolet Blazer Cars & Trucks

1 Answer

I have a 2003 gmc yukon 5.3 the engine idles rough sometimes the idle will get so low the engine will shut off.(the engine runs good while driving) hooked to scaner po101 maf/vaf (dont know what vaf is),...

you have a vacume leak somewhere.check all of your vacume hoses for leaks.Injector seals can cause this too.Also intake gaskets could be leaking.Running to lean usually means the car is getting to much air coming in.To check leaks spray brake cleaner around the hoses and the bottom of your intake if the rpms change then you found a leak.

Feb 21, 2010 | 2003 GMC Yukon XL

1 Answer

Mercedes C280 1996- What and where is a Mass or AirFlow Circuit Range/Performance problem- code Po101 and Fuel Trim Malfunction Code P0170, my car will not pass smog due to this, please help. Thanks

This is difficult because the computer can't detect a problem, your car thinks everything is ok. In reality what is happening is the electrical component inside the MAF sensor becomes contaminated by the impurities in the air (heavies) These containments imbed themselves to electrical component that senses the air flow causing the sensor to be slightly off, but not enough to trigger the MIL (malfunction indicator lamp). Replace the MAF sensor with a new sensor and you're problem will go away, plus your car get better mileage and performance. (Mass Air Flow MAF sensor

Jul 14, 2009 | 1996 Mercedes-Benz C-Class

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