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Mass of Volume Air Flow 'A' Circuit Range/Performance

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Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby BraakMan » Thu Jan 01, 2026 9:17 pm

Happy new year, keeping it rolling!

Hello to all of you, I first like to thank you all for the heaps of info I found over the years on this forum. It's been helping me out whit all sorts of questions and little trouble that is expected by running any vehicle.

I've run into the same "P00BD - Mass of Volume Air Flow 'A' Circuit Range/Performance - Air flow too high" code on my girlfriend her Ford Transit mk7 2.2 125bhp fwd 2012 Euro 5 225.00km / 139.808 mile. When you put the engine to work at higher speeds ( about 100kmh / 60 mile/h) cog light comes on, power is cut, sometimes engine warning light pops up.

So, what have we done:

- replaced Mass Airflow sensor - did a reset - didn't change a thing
- took off all the air hoses, visual check and cleaned them out. Yes there was oil, no collection of oil in the intercooler. Fitted a oil catch can afterwards.
- did a break cleaner leak test - no leaks on the vacuum part of the air hoses and conections
- replace inlet temp sensor - didn't change a thing
- changed egr valve - did a reset - didn't change a thing
- changed the turbo - did a reset - didn't change a thing
- changed the injector seals and rings - didn't change a thing

So now I've unplugged the plug on the EGR valve, got the suspected engine warning light, but the van just runs fine. At higher speeds (over 100kmh / 60 miles/h) and getting on to the motorways there's no power loss, no cog light . . . . so . . . is it the brand new genuine ford EGR valve that's not functioning? Or are there any other suggestions / options? Cause it feels like chasing a ghost . . .

Running ForScan

Still very optimistic.

Looking forward to get some advise, thanks in advanced !
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Re: Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby andz327 » Thu Jan 01, 2026 10:18 pm

WHY HAVE YOU FITTED ALL THOSE PARTS ????

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Re: Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby Airthies » Thu Jan 01, 2026 11:11 pm

Have you tested any wiring?
Or is it simply loading the parts cannon and hoping?

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Re: Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby metalworker0 » Thu Jan 01, 2026 11:19 pm

how much of the turbo did you change .. if the actuator wasn't changed, then suspect that.

all the best.mark
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Re: Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby andz327 » Fri Jan 02, 2026 12:13 am

Airthies wrote:Have you tested any wiring?
Or is it simply loading the parts cannon and hoping?

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happy new yin mucker

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Re: Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby trnx » Fri Jan 02, 2026 12:42 am

BraakMan wrote:Happy new year, keeping it rolling!

Hello to all of you, I first like to thank you all for the heaps of info I found over the years on this forum. It's been helping me out whit all sorts of questions and little trouble that is expected by running any vehicle.

I've run into the same "P00BD - Mass of Volume Air Flow 'A' Circuit Range/Performance - Air flow too high" code on my girlfriend her Ford Transit mk7 2.2 125bhp fwd 2012 Euro 5 225.00km / 139.808 mile. When you put the engine to work at higher speeds ( about 100kmh / 60 mile/h) cog light comes on, power is cut, sometimes engine warning light pops up.

So, what have we done:

- replaced Mass Airflow sensor - did a reset - didn't change a thing
- took off all the air hoses, visual check and cleaned them out. Yes there was oil, no collection of oil in the intercooler. Fitted a oil catch can afterwards.
- did a break cleaner leak test - no leaks on the vacuum part of the air hoses and conections
- replace inlet temp sensor - didn't change a thing
- changed egr valve - did a reset - didn't change a thing
- changed the turbo - did a reset - didn't change a thing
- changed the injector seals and rings - didn't change a thing

So now I've unplugged the plug on the EGR valve, got the suspected engine warning light, but the van just runs fine. At higher speeds (over 100kmh / 60 miles/h) and getting on to the motorways there's no power loss, no cog light . . . . so . . . is it the brand new genuine ford EGR valve that's not functioning? Or are there any other suggestions / options? Cause it feels like chasing a ghost . . .

Running ForScan

Still very optimistic.

Looking forward to get some advise, thanks in advanced !


Smoke or pressure test of inlet system probably shows where there is a leak.
See O Riley vid - does it on a Transit FWD looks like an E 6 or newer model, E5 probably the same set up.

RESET do you refer to reset as in reset DTCs?
What is the brake cleaner leak test? The inlet system is pressurized not a vacumm.
Which injector seals did you change?
Mk 7 E5 DPF RWD XLWB SRW
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Re: Mass of Volume Air Flow 'A' Circuit Range/Performance

Postby Airthies » Fri Jan 02, 2026 5:49 am

andz327 wrote:
Airthies wrote:Have you tested any wiring?
Or is it simply loading the parts cannon and hoping?

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happy new yin mucker

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And to you buddy.

Sent from my Pixel 8a using Tapatalk
2009 350T200 LWB medium roof, converted to 4x4 (the 2nd namby-pamby job)
2008 350LWB 115PS ex welfare van
2008 350LWB 115PS ex fitters van "retired" :cry:
Bikes, yes, a few bikes.
V86+patch
V86.04
X-Prog
C81
User avatar
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