Dpfe sensor location - 1993 Toyota Previa

The P1405 trouble code on a 1996 Mercury Tracer indicates an issue with the differential pressure feedback electronic sensor circuit (DPFE). The DPFE sensor is located on the driver's side of the engine compartment, mounted to the firewall.
To locate the sensor hose, follow the black rubber hose that connects to the sensor. The hose will lead to the EGR valve, which is located on the intake manifold.
Unfortunately, I am not able to provide pictures, but a quick online search may yield helpful visual aids.

Google image it

The EGR is on the Differential Pressure FEedback system. The EGR is located on top middle of the backside of the engine It is round and has a hose attached to it.

the DPFE sensor located next to the egr valve follow egr valve vacuum hose it will lead you to the DPFE sensor.

P1405- Differential pressure feedback sensor upstream hose off or plugged
It has to do with your EGR operation

The Differential feedback pressure sensor is located under the hood on the drivers side.

If you locate your EGR valve you will see a tube going from it to your exhaust manifold.

you will notice 2 small tubes leading from the large one feeding into a small sensor....this is the DPFE sensor which is throwing your code.

Now....the DPFE "could" be doing its job by telling you the orfice in the tube is plugged, but the DPFE is known to fail on these trucks.....but it throws a code P401....

It may be a good idea to try a new DPFE sensor before a new EGR tube.


Hope helps.

DPFE sensor failures are VERY COMMON on Ford vehicles. However, clogged EGR ports are also very common on 5.4L Ford engines. The DPFE sensor is located on the left side of the engine. It connects to two silicone rubber hoses that connect to the steel EGR tube coming from the back of the engine to the EGR valve. (See picture of the sensor below)

Another common failure is a DPFE sensor that has melted due to excessive exhaust back-pressure. If you find the DPFE sensor melted, suspect a restricted exhaust. (smashed tailpipe, clogged catalytic converter, etc..)

P1405 - Differential pressure feedback sensor upstream hose off or plugged

It has to do with your EGR operation. The Differential feedback pressure sensor is located under the hood on the drivers side.

If you locate your EGR valve you will see a tube going from it to your exhaust manifold. You will notice 2 small tubes leading from the large one feeding into a small sensor... this is the DPFE sensor which is throwing your code.

Now... the DPFE "could" be doing its job by telling you the orfice in the tube is plugged, but the DPFE is known to fail on these trucks.....but it throws a code P0401...

It may be a good idea to try a new DPFE sensor before a new EGR tube.

Hope this helps; keep us updated.

Dpfe sensor is usually on driver side intake manifold or on a bracket attached to it. It has 2 vacuum ports & a electrical plug. Look for cracked or broken vauum hoses going to it. I would fix any broken vacuum hoses, if none change the dpfe sensor(aka:egr position sensor) only & it will usually cure both codes.

DPFE Sensor upstream hose bad. Google DPFE Sensor location. Then remove and replace or clean hoses, Clean connectors at sensor. If this does not clear problem replace Sensor.

The DPFE is located near the EGR valve, it has 2 very thick silicone rubber hoses connected to it that come off the exhaust. It is rectangular and about 1/2 the size of a pack of smokes