F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
P2105 - P2109: Testing and Inspection
P2106
For diagnosis of code P2106 refer to chart
P1641-P2106
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