IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

How to reset Air Mass Flow (MAF) sensor adaptives? Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

GDiode
Posts: 28
Joined: Mon Mar 02, 2015 9:37 am
Year and Model: 2004 V70 NA
Location: Wolf Creek, OR
Has thanked: 0
Been thanked: 0
United States of America
GDiode

How to reset Air Mass Flow (MAF) sensor adaptives?

Post by GDiode » Thu Mar 02, 2017 4:36 pm

I did some research when my 2004 V70 NA started stalling after the engine warmed up and then coming to a stop. I put some additive in the gas tank when a thread talked about water in the gas. That didn't help. I then cleaned the MAF, unplugged the battery and held the cables together. That didn't help I then bought a new Volvo MAF unplugged the battery for 10 minutes and went through a series of steps like making sure all the accesories were off, turning the key to position 1, ect, that I had found on a Forum. That didn't help.
Is there a way I can reset the adaptives without taking it to a shop that has VIDA or something else. I've driven it about 300 miles since replacing the MAF. Will the computer reset the air setting on it's own after a certain number of miles? Thank you, Shannon.
'96 855 NA 269,000
'94 854 Turbo 162,000 rebuilding the head after a burned valve
'95 854 Turbo parts car
'03 V70 XC 142,000
'04 V70 NA 230,000
'04 S60 NA 152,000 oldest daughter's car
2005 Mazda 5, 5sd 163,000
2001 Excursion 7.3 power stroke 135,000

User avatar
oragex
Posts: 4612
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 92 times
Been thanked: 233 times
Contact:
Canada
oragex

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by oragex » Thu Mar 02, 2017 5:18 pm

Not sure the MAF is the issue. First make sure the butterfly valve on the throttle body is clean on both sides.
Revs dropping when coming to a stop may also point a leak near or at the brake booster.
To reset the car ECU I keep the key in ignition Pos II then disconnect the red battery cable for several hours. The fan speed knob on the CCM module won't have any light and turn at full speed when the ECU has reset. Same thing key in Pos II when reconnecting the battery.

JRL
Posts: 9351
Joined: Tue Nov 22, 2005 2:07 pm
Year and Model: Several
Location: 19333
Has thanked: 0
Been thanked: 12 times
United States of America
JRL

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by JRL » Thu Mar 02, 2017 8:32 pm

There are none.
Nothing TO reset on a MAF
If a new one didn't help .... look, elsewhere!
2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

Contact info for purchases: [email protected]

User avatar
abscate
MVS Moderator
Posts: 20035
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 273 times
Been thanked: 852 times
Trinidad & Tobago
abscate

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by abscate » Fri Mar 03, 2017 4:02 am

Check your short term fuel trim or a removal-inspection of vacuum hoses looking for leaks.

Check fuel pressure regulation on these cars, check fuel pressure at the rail.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

GDiode
Posts: 28
Joined: Mon Mar 02, 2015 9:37 am
Year and Model: 2004 V70 NA
Location: Wolf Creek, OR
Has thanked: 0
Been thanked: 0
United States of America
GDiode

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by GDiode » Sat Mar 04, 2017 5:27 pm

Thank you guys for your responses.
I hadn't mentioned in my original post that along with the stalling it is making a high pitch whine also when the engine warms up. That along with the stalling and the slight "diesiling" at stops is what lead me to the post about the MAF needing to be replaced. It almost seems like there is to much pressure inside the engine when it's idling.
Abscate, I'll check the fuel pressure at the rail. What is an acceptable PSI?
Oragex, I'll see if the butterfly valve is clean. Would a leak at the brake booster show as the brake fluid level dropping? Because it has been consistantly full.
Thanks,
Shannon
'96 855 NA 269,000
'94 854 Turbo 162,000 rebuilding the head after a burned valve
'95 854 Turbo parts car
'03 V70 XC 142,000
'04 V70 NA 230,000
'04 S60 NA 152,000 oldest daughter's car
2005 Mazda 5, 5sd 163,000
2001 Excursion 7.3 power stroke 135,000

MadeInJapan
MVS Moderator
Posts: 13423
Joined: Thu Mar 31, 2005 7:14 am
Year and Model: '98 S70 T5 '07S40T5
Location: Knoxville, TN American but born in Japan
Has thanked: 7 times
Been thanked: 19 times
United States of America
MadeInJapan

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by MadeInJapan » Mon Mar 06, 2017 6:37 pm

Then clogged PCV? Do a glove test...put a latex glove on the oil inlet on your engine and start your engine and let it idle. See if the glove blows up...it shouldn't. If it does you have positive pressure in your engine that needs to be taken care of with a PCV over-haul.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
'07 S40 T5 AWD 6 speed manual! Silver/Black Stage1 Heico & Elevate
'07 S60 2.5T Blue/Taupe- my kid's Volvo

User avatar
abscate
MVS Moderator
Posts: 20035
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 273 times
Been thanked: 852 times
Trinidad & Tobago
abscate

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by abscate » Wed Mar 08, 2017 4:31 am

GDiode wrote:Thank you guys for your responses.
I hadn't mentioned in my original post that along with the stalling it is making a high pitch whine also when the engine warms up. That along with the stalling and the slight "diesiling" at stops is what lead me to the post about the MAF needing to be replaced. It almost seems like there is to much pressure inside the engine when it's idling.
Abscate, I'll check the fuel pressure at the rail. What is an acceptable PSI?
Oragex, I'll see if the butterfly valve is clean. Would a leak at the brake booster show as the brake fluid level dropping? Because it has been consistantly full.
Thanks,
Shannon
P2 pressure should be 50 psi and there is a spec for holding a certain pressure at shutoff too

Search of "P2 fuel pressure specification "

viewtopic.php?f=9&t=75015&p=398621#p398621
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

GDiode
Posts: 28
Joined: Mon Mar 02, 2015 9:37 am
Year and Model: 2004 V70 NA
Location: Wolf Creek, OR
Has thanked: 0
Been thanked: 0
United States of America
GDiode

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by GDiode » Thu Mar 09, 2017 5:23 pm

I took the oil filler cap off and it took a little more strength to open due to a vacuum that had been created. When the vacuum seal broke on the cap it made a whoosh sound and the high pitch whine went away. I put the glove on and it sucked the glove in. I believe the engine dieseling went away as well. What would cause this? If the PCV is clear would a severely plugged catalitic converter cause the vacuum? Would it also cause the stalling when the whine starts. It runs totally fine at idle and driving until it warms up enough to create the whine? Any ideas? I still haven't checked the throttle body butterfly valve to see if it's gummed up because I assumed I would need a new gasket when I put it back on. Any ideas?

Thanks, Shannon
'96 855 NA 269,000
'94 854 Turbo 162,000 rebuilding the head after a burned valve
'95 854 Turbo parts car
'03 V70 XC 142,000
'04 V70 NA 230,000
'04 S60 NA 152,000 oldest daughter's car
2005 Mazda 5, 5sd 163,000
2001 Excursion 7.3 power stroke 135,000

JRL
Posts: 9351
Joined: Tue Nov 22, 2005 2:07 pm
Year and Model: Several
Location: 19333
Has thanked: 0
Been thanked: 12 times
United States of America
JRL

Re: How to reset Air Mass Flow (MAF) sensor adaptives?  Topic is solved

Post by JRL » Fri Mar 10, 2017 8:42 am

That is a bad PCV (breather system) it needs to be renewed.
N/A's whistle when clogged up
I have replaced several of these, I don't know why non turbos whistle when clogged up and turbos don't but they do...(fact of Volvo life).
You need to bite the bullet, do a complete breather with all new parts and hoses and at that time clean the throttle (carefully)
2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

Contact info for purchases: [email protected]

GDiode
Posts: 28
Joined: Mon Mar 02, 2015 9:37 am
Year and Model: 2004 V70 NA
Location: Wolf Creek, OR
Has thanked: 0
Been thanked: 0
United States of America
GDiode

Re: How to reset Air Mass Flow (MAF) sensor adaptives?

Post by GDiode » Fri Mar 10, 2017 4:12 pm

How accurate is the glove test? It sucked in the glove really fast. The sound does sound like its coming from the front of the engine under the injectors which could also be from the oil trap part of the PCV. Today as it was making the whining sound I removed the oil filler cap with the engine running and the noise went way put the cap on it immediately comes back. If its the PCV cool I can handle that but how often does the glove test not work? Could it be a NA versus turbo thing?

Thank you,
Shannon
'96 855 NA 269,000
'94 854 Turbo 162,000 rebuilding the head after a burned valve
'95 854 Turbo parts car
'03 V70 XC 142,000
'04 V70 NA 230,000
'04 S60 NA 152,000 oldest daughter's car
2005 Mazda 5, 5sd 163,000
2001 Excursion 7.3 power stroke 135,000

Post Reply
  • Similar Topics
    Replies
    Views
    Last post