Error code p0402 on Ford Escape?

P0402 means Exhaust Gas recirculation flow excessive detected.
P0402 can be caused by a bad DPFE sensor, EGR regulator solenoid, EGR valve or plugged intake manifold EGR port. The most common failures are the DPFE sensor and plugged ports. To unplug the intake port, remove the EGR valve and use stiff mechanics wire and carb cleaner to clear the port.

DPFE is Differential Pressure Feedback EGR sensor. It should be on the right rear of the engine. You will know it by the 2 rubber hoses leading into it from the exhaust manifold. It will have an electrical connector and should be about 1 1/2inch by 2inch rectangle black sensor.

It should look similar to this. Hose nipples may be located differently.

This will help.

Thanks.

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