E 150 V8-4.6L SOHC VIN W (2004)
P1640 - P1644: Testing and Inspection
P1640
For diagnosis of code P1640 refer to NOTE 23:
NOTE 23: See Bi-Fuel CNG Models or Bi-Fuel LPG Models Testing for instructions on how to retrieve DTCs from the secondary module. See
P1640 in Diagnostic Trouble Code (DTC) Descriptions for additional information.
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Bi-Fuel CNG Models.
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Bi-Fuel LPG Models.
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Diagnostic Trouble Code (DTC) Descriptions. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic
Trouble Code Descriptions
If there is no link in the chart then:
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This code is not a valid code for this vehicle
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Or information published by the manufacturer for this vehicle did not include this code
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For complete diagnosis of the Engine Control system, follow this link: See: Powertrain Management/Computers and Control Systems/Testing and
Inspection