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P0643 Diagnostic Trouble Code Discussion for June 2008

Sensor Power Supply Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0643
Help Request Posted
2005 Dodge Ram 3500 SLT 5.9L Hesitation, MIL Lamp on VIN: 3D7LS38CX5
P0643: sensor referance voltage low. builds no boost ck all hoses/connections,turbo wheel,intake.on road test can here turbo but will not accell.runs up to 24 on map under load with 2psi boost.ck air filer,fuel pressure as well.problem occurs for sometimes usual a day then goes back to normal run...
June 24, 2008