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P1401 Diagnostic Trouble Code Discussion for May 2004

EGR Temperature Sensor Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1401
Help Request Posted
1997 Ford F-150 Lariat 4.6L MIL Lamp on VIN: 1FTDX1862V
P1401: memory code egr low flow detected. Hello, this vehicle has continous code p1401, egr low flow and KOEO code p1408 egr low flow detected.Vacuum source to egr is ok. Wiring and reference voltage to DPFE sensor is good. DPFE sensor checks ok and voltage changes when vacuum is applied to reference ...
May 19, 2004