Overboost or bad map
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More Turbo
Joined: Nov 2012
Posts: 727
Likes: 1
From: Chariton, IA
Overboost or bad map
Drove my truck today to see what cosed popped up. I just replaced ICP sensor aand installed a T500, FRX, HPX, whistlin wheel, and a banks big head.
Getting a couple codes
P0238 - Turbo/supercharger boost sensor A circuit high
P1249 - wastegate control valve performance.
I have DP tunes and think Jody writs his tunes so the 1211 doesn't show up. I have read the overboost foolers will take care of this and read the 238 code means your map sensor is bad. Also it only trips the light during hard acceleration when my map reading hits 40psi and when the light comes on it drops to about 20psi.
I'm thinking i probably just need Clay's OCR just wanted some other opinions.
Getting a couple codes
P0238 - Turbo/supercharger boost sensor A circuit high
P1249 - wastegate control valve performance.
I have DP tunes and think Jody writs his tunes so the 1211 doesn't show up. I have read the overboost foolers will take care of this and read the 238 code means your map sensor is bad. Also it only trips the light during hard acceleration when my map reading hits 40psi and when the light comes on it drops to about 20psi.
I'm thinking i probably just need Clay's OCR just wanted some other opinions.
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
Not that i ever want to disuade anyone from sending clay money...
But you could pick up a small air pressure regulator at harbor freight for around 5$
Then just dial it in to where you want the highest map reading to be.
I picked one up for this reason... just havent hooked it in yet.
But you could pick up a small air pressure regulator at harbor freight for around 5$
Then just dial it in to where you want the highest map reading to be.
I picked one up for this reason... just havent hooked it in yet.
Thread Starter
|
More Turbo
Joined: Nov 2012
Posts: 727
Likes: 1
From: Chariton, IA
Not that i ever want to disuade anyone from sending clay money...
But you could pick up a small air pressure regulator at harbor freight for around 5$
Then just dial it in to where you want the highest map reading to be.
I picked one up for this reason... just havent hooked it in yet.
But you could pick up a small air pressure regulator at harbor freight for around 5$
Then just dial it in to where you want the highest map reading to be.
I picked one up for this reason... just havent hooked it in yet.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
Myself and another member (honeydew) posted on this same problem a short time ago. We were both experiencing the overboost code even while running an OCR or MAP Regulator as I call mine. I monitored the pressure at which my regulator was set and found that anything over 22 psi would trip my SES light and set the code. I have an adjustable regulator, so I reset it to slightly under 22 and no more light/code. 
Some MAPs are more sensitive to this than others and need a little tweaking of the regulator to get it right. The best way is to monitor the MAP signal as read by the PCM. Mine is now reads ~21.6-21.9 psi at max.
Some MAPs are more sensitive to this than others and need a little tweaking of the regulator to get it right. The best way is to monitor the MAP signal as read by the PCM. Mine is now reads ~21.6-21.9 psi at max.
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