F 450 4WD Super Duty V10-68L VIN D (2004) DTC Codes P1235-P1239 Diagnosis Process Page 1001
P1235 - P1239: Testing and Inspection
P1237
For diagnosis of code P1237 refer to chart
P1151-P1309
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