Disco 2 Td5 MAF reading zero

youmitegetian · Dec 29, 2020

So I’ve got an intermittent low power issue, can be driving fine then power can drop off, if it does it under load it’s more instant and harsh than my foot slipping off the throttle.
Only codes on Hawkeye are 8014 & 8046,
MAF was showing zero on live data so replaced, still showing zero.
Are the faults even related as the MAF shows zero even when it’s running well.
Where else should I be looking?

sierrafery · Dec 29, 2020

youmitegetian said:
Only codes on Hawkeye are 8014 & 8046,

Eventually tell the clear description of those codes and what year is the D2 if you want proper help cos those figures mean nothing. As about MAF reading 0, if fuse F2 is not blown then it's a circuit issue

youmitegetian · Dec 29, 2020

It’s a 2000 TD5, the 8014 says air flow low, the 8046 days air flow fault active.
I did research them which led me to get the live data which suggested the MAF was at fault but apparently not, is F2 in the engine bay fuse box?

sierrafery · Dec 29, 2020

F2 is in the engine bay, anyway being Eu2 even if the MAF is fubar it should not affect driveability but if the harness is hurt it can make trouble . The symptom you describe seems overboost so check everything wastegate related and make sure that the turbo side is not sticking

youmitegetian · Dec 29, 2020

Ok thank you, sounds like something to check tomorrow, will report back.

sierrafery · Dec 29, 2020

If fuse F2 is good see this

Stanleysteamer · Dec 29, 2020

sierrafery said:
F2 is in the engine bay, anyway being Eu2 even if the MAF is fubar it should not affect driveability but if the harness is hurt it can make trouble . The symptom you describe seems overboost so check everything wastegate related and make sure that the turbo side is not sticking

+1 sounds like classic wastegate problem

Stanleysteamer · Dec 29, 2020

and if MAF is in doubt, just unplug it, it'll run almost as good without, certainly better than if the MAF is misbehaving.
But losing power under load, normal power temporarily restored with an ignition switch off then restart, until you ask it for more power e.g hard acceleration or going up a hill, is more or less deffo a waste gate problem, or with the actuator.

youmitegetian · Dec 29, 2020

So just checked the fuse and was ok so yes wastegate it could well be, new turbo or is there a fix? Or a way to test? But it’s doing exactly as you describe

Disco 2 Td5 MAF reading zero

youmitegetian

Active Member

sierrafery

Well-Known Member

youmitegetian

Active Member

sierrafery

Well-Known Member

youmitegetian

Active Member

sierrafery

Well-Known Member

Stanleysteamer

Well-Known Member

Stanleysteamer

Well-Known Member

youmitegetian

Active Member

Similar threads