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post #1 of 13 (permalink) Old 3rd December 2012 Thread Starter
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Atmospheric pressure sensor

Hi, Does anyone know where the atmospheric pressure sensor is on a 2004 Megane 1.9dCi? Many thanks if you do.
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post #2 of 13 (permalink) Old 3rd December 2012
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Re: Atmospheric pressure sensor

Are you referring to the MAP sensor ??

Sometimes referred to as the turbo pressure sensor.
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post #3 of 13 (permalink) Old 4th December 2012 Thread Starter
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Re: Atmospheric pressure sensor

Quote:
Originally Posted by madnoel10 View Post
Are you referring to the MAP sensor ??

Sometimes referred to as the turbo pressure sensor.
Hi, thanks for your reply. I've had the car on the Clip box and the MAP sensor signal is fine, I also unplugged the MAP sensor with the car running and it's signal then dropped out. It's the atmospheric pressure signal that is grounding to earth which is the problem, I just don't know where the sensor is located on the car.
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post #4 of 13 (permalink) Old 4th December 2012
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Re: Atmospheric pressure sensor

To be honest I have never heard of an atmospheric sensor - I wonder if it's the MAF sensor which measures air intake volume and temperature.
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post #5 of 13 (permalink) Old 4th December 2012 Thread Starter
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Re: Atmospheric pressure sensor

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Originally Posted by madnoel10 View Post
To be honest I have never heard of an atmospheric sensor - I wonder if it's the MAF sensor which measures air intake volume and temperature.
I checked the MAF sensor signal as well, the values seemed correct and again I unplugged it with the engine running and it's signal then dropped out. The value of the atmospheric sensor was in millibars pressure rather than a flow value. It's sometimes called a barometric pressure sensor as well. I've known them to be fitted in the boot in other cars but on mine it's gets worse when the engine is warm which makes me think its under the bonnet somewhere.
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