What is this module on the side of the airbox?

Yeti · **Posted:** Fri Aug 21, 2015 5:22 am

it's another MAP sensor , but I'm not sure if that measure the vacuum in the intake for calculate the engine load

lacabrera · **Posted:** Fri Aug 21, 2015 11:02 am

As far as I remember it measures air pressure and compares it with the air flow meter and map sensor to determine if the air filter is becoming blocked. Well that's what I was lead to believe.

flash7210 · **Posted:** Fri Aug 21, 2015 6:23 pm

Its the air inlet pressure sensor.

Yeti · **Posted:** Sat Aug 22, 2015 6:31 am

Yes , but the real question is what to do :-)

flash7210 · **Posted:** Sat Aug 22, 2015 7:31 am

Just leave it plugged in.
With a stock engine tune, it you unplug that sensor, you will have reduced power.

As far as I know, the GDE tune is the only one that allows you to unplug that sensor without effecting engine performance.

Yeti · **Posted:** Sat Aug 22, 2015 8:58 am

yes in "teory" if you delete the DTC in the table , you do not have the power cut , because the ecu do not know what to do after the impulse that say " hey , I'm unplugged" is detected , but I'm really courious of what this sensor really do , I know the only pressure reading is assigned at the MAP in the intake manifold and in the ECU , one inside the ECU reads the real atmospheric pressure and compare it with the MAP for every managment and adaptation , but I want to know what this another MAP say at the ECU and what purpose has

lacabrera · **Posted:** Sun Aug 23, 2015 5:32 am

I think the sensor is for reading atmospheric pressure to adjust fuelling depending on altitude.

Yeti · **Posted:** Sun Aug 23, 2015 8:58 am

if I unplug it , I still reading atomspheric pressure and intake pressure with a Launch X 431 , I do not know if is an error or what , but I doubt , I must try to do some more test to verify

flash7210 · **Posted:** Sun Aug 23, 2015 12:07 pm

Isnt the atmospheric pressure sensor is inside the ECU?

lacabrera · **Posted:** Sun Aug 23, 2015 1:39 pm

I could be wrong but I wouldn't think there is a sensor inside the ECU.

lacabrera · **Posted:** Sun Aug 23, 2015 1:46 pm

Yeti wrote:

if I unplug it , I still reading atomspheric pressure and intake pressure with a Launch X 431 , I do not know if is an error or what , but I doubt , I must try to do some more test to verify

when its disconnected the ECU uses an average value and gives a CEL and that's sufficient to get you home/serviced.

Yeti · **Posted:** Sun Aug 23, 2015 2:28 pm

I know , I have tryed it :-)

, rev at max 3000 rpm

flash7210 · **Posted:** Sun Aug 23, 2015 2:36 pm

lacabrera wrote:

I could be wrong but I wouldn't think there is a sensor inside the ECU.

I agree, but if you search posts about ambient pressure sensor they all refer to the ECU.

And if you search posts for air inlet pressure sensor, they all refer to the sensor on the air box with nobody having any clue what it does other than the possibility of measuring air filter restriction.

What is this module on the side of the airbox?

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