F 150 2WD Pickup V8-5.4L SOHC SC VIN 3 (2003)
P0600 - P0604: Testing and Inspection
P0603
For diagnosis of code P0603 refer to chart
P0500 - P071x
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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