Matthew 6.5 turbo diesel

Matt17653Matt17653 Member Posts: 1
edited January 2021 in GMC
Hi I have a 1997 6.5 turbo diesel 257k on i it I have a code which is p0236 and I already did the all the vacuum only things I haven’t changed is the wastegate and turbo. The code goes off in the morning but once I hit around 2200 rpm the light comes back I was wondering if anyone can help me with figure out what could be wrong


  • thecardoc3thecardoc3 Member Posts: 5,730
    When the code sets what is the desired versus the actual boost pressure shown in scan data?
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