F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
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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 Transmission Control system, follow this link: See: Powertrain Management/Transmission Control Systems/Testing and
Inspection
Engine Control
P1641-P2106
If there is no link in the chart then: