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Rambles



Member Since: 16 Apr 2011
Location: UK
Posts: 800

2011 Range Rover Vogue SE TDV8 Stornoway Grey
Difference between MAP and MAF sensors

I get confused between the difference
And also maybe some folks might have meant one but typed the other

Can folks confirm what they do and where they are please ?
Thanks

Post #625524 6th Mar 2022 4:11pm
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Baltic Blue



Member Since: 13 Aug 2015
Location: North Wales
Posts: 3765

United Kingdom 2011 Range Rover Vogue SE TDV8 Baltic Blue

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This is the sensor that requires most regularly cleaning, I clean mine every 6 months at the same time as I am changing the oil and filter.

It’s full name is the Manifold Absolute Pressure and Temperature sensor, (MAPT) Sensor.

Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Post #625527 6th Mar 2022 4:43pm
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Baltic Blue



Member Since: 13 Aug 2015
Location: North Wales
Posts: 3765

United Kingdom 2011 Range Rover Vogue SE TDV8 Baltic Blue

There are 2 M.A.F sensors ( Mass Airflow Sensors ) , one in each of the air filter ducting, that require less frequent inspection.


Click image to enlarge


Mike




 G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Post #625534 6th Mar 2022 5:18pm
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JayGee



Member Since: 27 Jul 2021
Location: London
Posts: 3200

United Kingdom 2012 Range Rover Vogue 4.4 V8 Orkney Grey

MAP sensors measure intake pressure ( absolute pressure and not relative to weather or altitude). MAF sensors measure air mass (not volume so it's temperature and pressure independent) entering the intake. One map sensor and a MAF on each intake. Both are used to calculate fuelling, boost and identify any faults ( leaks) if they present unexpected data to the ECU. MAP sensor needs regular cleaning as it's position mean it's getting soot from the EGR which can make it slow to respond to throttle pedal input ( hesitation) . MAF sensors shouldn't need any work as they just get clean air. There is also an AIT sensor before the throttle which measures the intake temperature post turbo and IC. 2012 TDV8 Vogue (L322)

Post #625544 6th Mar 2022 6:48pm
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Rambles



Member Since: 16 Apr 2011
Location: UK
Posts: 800

2011 Range Rover Vogue SE TDV8 Stornoway Grey

Is there a recommended way of cleaning the sensors? Bit of brake cleaner ? Compressed air blast ?

Post #625614 7th Mar 2022 3:29pm
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Dolphinboy



Member Since: 07 Dec 2009
Location: Bristol
Posts: 3137

United Kingdom 2011 Range Rover Vogue TDV8 Atacama Sand

I used brake cleaner and worked a treat.

Post #625623 7th Mar 2022 4:48pm
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