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Error code P1238

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Old Oct 6, 2008 | 08:48 AM
  #1  
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Default Error code P1238

I posted awhile back I have readwhere this is related to the turbo control valve.
2000 S80 T6, twin turbo (2.8L)
Replaced flywheel, replaced timing belt at same time (see post https://volvoforums.com/m.asp?m=122104). Had much difficulty setting timing. After setting timing correctly, car cranked and idled good. Took for test drive, ran sluggish, no turbo feel but ran well enough to take for a test drive. Accelerated to 5000 rpms, then car ran only at idle, cut off frequently. Had to tow it back to shop. Cleared codes, started again, only code now is p1238. How does this affect idle? Runs as if it is out of gas. Idles, but will not accelerate, cuts off, dies if left at idle. If feather accelerator it will continue to idle and can drive only at idle.
 
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Old Oct 6, 2008 | 09:31 AM
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tech's Avatar
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Default RE: Error code P1238

All I have for that code is fuel pump secondary circuit.
If someone had the translation from P to Volvo code then I could help more.
 
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Old Oct 6, 2008 | 05:58 PM
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air force rascal's Avatar
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Default RE: Error code P1238

TECH...I get Turbo Control Valve..thru my listing.
 
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Old Oct 6, 2008 | 06:10 PM
  #4  
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Default RE: Error code P1238

Could be maybe it is bad.
 
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Old Oct 7, 2008 | 02:10 AM
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Default RE: Error code P1238

yeah..its a turbo control code.. maybe getting too much boost or not enough due to a leaking hose somewhere ...
 
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Old Oct 7, 2008 | 06:47 AM
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Default RE: Error code P1238

The hose that connects to the flow cooler (radiator for air, btw ac & coolant radiators) was partially off, not connected correctly, so this code was correct. What I did not realize was that it would go into "limp mode" where it runs just enough to limp home. This is what threw me. After connecting hose and clearing the code, it cranked and ran.
Now it is throwing a P1153 code.
Do you have any thoughts what/where/how to fix this?
Thanks.
Brad
 
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Old Oct 7, 2008 | 06:49 AM
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Default RE: Error code P1238

So I better post this as a different post to get exposure.
Thanks to all for reading and posting.
 
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Old Oct 9, 2008 | 12:41 AM
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Default RE: Error code P1238

Code P1153 is the 02 Sensor Front Bank 2...Good Luck and Happy Motoring...
 
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Old Oct 9, 2008 | 07:53 AM
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Default RE: Error code P1238

Dave, thanks for the translation.
I went out to start the car two days back, and had inadvertently left the key on, so it was dead, and the deadness reset the codes, now it gives a p1133.
I take it for test drives each day to see if the codes are the same and the code has remained 1133 each day.
The turbo seems ineffective until the rpms get above 3.5k.
No low end grunt, would not pull out into traffic without lots of room to accelerate.
Acts like there is something keeping it from moving quickly.
Any sugestions are good.
It also had a bad coil which I thought may have thrown the code, but after replacing the coil it still is slow to go, though it is much smoother.

I'll start a new post because this has evolved from p1238 to p1153 to p1133.
Thanks.
 
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Old Jul 6, 2009 | 11:09 AM
  #10  
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Default

I pulled a P1238 on my 2001 2.4l S60 turbo when it died, would not stay on or keep idling. Replacing the TCV did nothing. Replaced the fuel filter as well. Read about disconnecting the MAF (Mass air flow) sensor as posted by Tech. Started right up. Ordered a new MAF.

Thanks Tech for all of your input.
 
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Old Aug 4, 2010 | 11:09 PM
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Default code p1238

can you tell me what is a maf? and where do i find it to replace it

thanks stlpnoble
 
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Old Mar 23, 2011 | 12:30 PM
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Default i need help

i just replaced the motor in a 2001 volvo s80 t-6 and now i am getting a bunch of transmission codes.... the trany shifted fine be for i did the motor swap and now i have codes.... can anyone help me???
 
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Old Mar 23, 2011 | 01:25 PM
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Originally Posted by stlpnoble
can you tell me what is a maf? and where do i find it to replace it

thanks stlpnoble
Mass Air Flow. It is attached to the top of your air filter box, between the box top and the pipe that runs to the throttle body.
 
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Old Feb 1, 2023 | 07:49 PM
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Originally Posted by tech
All I have for that code is fuel pump secondary circuit.
If someone had the translation from P to Volvo code then I could help more.
P in error code is powertrain
 
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