What is this part?
Safety Car
Joined: May 2006
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From: St. Louis, MO
Tech Contributor
Definitely not mine. My harnesses are plug and play, wires are colored to closely match factory, and I don't use electrical tape.
Race Director
Joined: Jul 2007
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From: Texas Hill Country
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Race Director
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From: Texas Hill Country
Either you need a change in the tune to accommodate the parts/sensor(s) or the harness is not, uh, a good one.
You should not be getting any codes if done right.
Race Director
Joined: Jul 2007
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From: Texas Hill Country
I would agree, the stock map sensor is acting as the baro sensor now and the LS9 sensor in the intake reads the map....the baro sensor code pops up it would normally be related to the maf, but now it's broken out to the harness/sensor pictured.
Drifting
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
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Funny but so f'ing true .............
Race Director
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From: Texas Hill Country
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
................
Race Director
Joined: Jul 2007
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From: Texas Hill Country
The point of it is to pull the Barometric Pressure sensor out of the intake tube and let it read regular air pressure instead of tube pressure. This is because when you are running boost, the Baro sensor would also read boost. The atmosphere is not boosted so this is incorrect.
The boost is read in the intake manifold by a map sensor that can read it, like the LS9 sensor, which is plug and play with the LT1.
The E92 ECM does not use Map for fueling it uses Pressure Ratio which is MAP/Baro. If baro is boosted then PR will be 1:1, which is wrong.
There is a good chance you are getting that Baro code because your tune is wrong and does not properly describe the change.