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P0238 Diagnostic Trouble Code Discussion for December 2008

Turbocharger Boost Circuit High Voltage

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Trouble Ticket Help Requests for DTC P0238
Help Request Posted
2002 GMC Savana 3500 6.5L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Misfire VIN: 1GDJG31F72
P0238: Turbocharger Boost Circuit High Voltage. I work on very few of these so I am not well versed on how GM controls these. I cannot get this pump to time correctly. When it came in the offset was +.09 and under timing enable procedure the DES and ACT were both 0. I adjusted the pump toward the drivers ...
December 24, 2008