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Look to the exhaust manifold. A tube comes from it to the EGR valve.(close to the top). on that tube will two tubes coming off it, with rubber hoses. The hoses connect to the DPFE.
no tubes going to the egr except a coolant line. its bolted to the side of the motor rather than running tubesno tubes going to the egr except a coolant line. its bolted to the side of the motor rather than running tubes
If what I found is it. the DPFE is built into the egr valve. Six pin plug. A tube out the side at a 90 degree angle.If what I found is it. the DPFE is built into the egr valve. Six pin plug. A tube out the side at a 90 degree angle.
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DTC P1405 - Differential pressure feedback (DPFE) sensor upstream hose off or plugged Verify both hoses are connected to the DPFE sensor first. Ford has two versions of the sensor commonly used of this generation of modular engines.
The
first uses a pair of flexible hoses to make the connections from the
EGR tube to the sensor. The hose may fail and cause this problem.
The
second type of DPFE sensor is stalk-mounted. The two tubes from the EGR
tube come up to the sensor and the sensor is just pushed down onto the
ends of the tubes and is secured with hardware.
Inspect to see which type you have and whether there are any obvious connection failures.
Hope this helps (remember to rating this free answer).
P0402 Exhaust Gas Recirculation Flow Excessive DetectedA code P0402 most likely means one or more of the following has happened:
The DPFE (differential pressure) sensor is faulty and needs to be replaced
There is a blockage in the EGR (most likely carbon buildup)
The EGR valve is faulty
The EGR valve may not be opening due to a lack of vacuum
Solutions
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.
Check the voltage at the DPFE sensor both at idle and when the EGR is open
P0401 shows an Exhaust Gas Recirculation Flow Insufficient. Without a good scan-tool you will be playing the "Parts Changing Game". Insufficient flow can be the result of a vacuum leak, bad MAP sensor, an exhaust leak, faulty EBP sensor, carbon build-up, and so on. I wish I could say more but with all the electronics it is more complicated then earlier cars.
Sounds like you have a vacuum leak, a problem with the wiring, or a bad PCM. Check wiring for pinched, chafed, pierced, or broken wires. Make sure vacuum supply is good, and not collapsing when the vehicle is running. Beyond that, a trip to the dealer may be in order.
code 1402 EGR valve position sensor open or shorted, check the wires going to the sensor and the plug itself,hope this helps if not get back to me and we'll go from there
Check for restricted exhaust. Hook a vacuum/pressure gauge into hose going to DPFE sensor. You should read 1 PSI or less at idle and 3-4 psi at wide open throttle, anything more than this is a restriction which would most likely be a stopped up catalytic convertor.
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