My 2005 Ford F150 is displaying Diagnostic Trouble Code (DTC) PO405. I'm wondering if this code specifically points to a failure of the Diesel Particulate Filter Emission (DPFE) sensor. Can anyone confirm whether PO405 on a 2005 Ford F150 typically indicates an issue with the DPFE sensor?
Just yesterday I encountered the same issue on my 2003 F-150. I initially replaced a melted sensor hose, but that didn't resolve the problem. I then replaced the DPFE sensor itself, yet the code persisted. If anyone finds a solution, I'd greatly appreciate hearing about it.
A melted sensor hose often indicates excessive backpressure in the exhaust system, which can contribute to or cause PO405.
If you have a scan tool and are monitoring the DPFE sensor's voltage (PID), look for a reading of approximately 1 volt. A value above this threshold suggests a faulty or malfunctioning DPFE sensor.
Yes, in most cases, DTC PO405 on a 2005 Ford F150 is associated with a faulty DPFE sensor.