Code 402 0n 2001 mazda tribute

Is the solenoid opening to provide vacuum to the egr valve? Does the egr valve open when vacuum is applied? There are some tests posted at the link below.
Repair Guides Components Systems Exhaust Gas Recirculation egr System...

Matthew, Vacuum hose diagram should be under hood on a decal/label, on hood it self or on rad cradle usually. Check the attached links,instruction and guides, Good luck
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Failure of EGR Differential Pressure Sensor : Mazda Tribute ...

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Check Engine Light and Hesitation or Stumbling While Driving on Mazda Tribute ...this is my second egr valve and car is not picking up the right sped and when ... Mazda Tribute 2003, replacing burnt DPFE, connector bunrt, Need color pinout. ... Drivetrain · Electrical & Lights · Engine · Exhaust & Emissions · Heating & AC ...

Check Engine Light Diagnosis Cost for Mazda Tribute ...

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A Check Engine Light is turned on when the Mazda Tribute engine control module detects a fault in the emissions system. One or more diagnostic codes will be

This does not sound right at all. I have never heard of an EGR valve blowing holes! Buy a replacement like Ray says. If this happens again plan on replacing your exhaust system, all parts, because if it is clogged this is how car fires occur. Don't take the chance.

1. Remove the EGR valve.

1. Disconnect the vacuum line.
2. Disconnect the EGR tube.
3. Remove the EGR valve and discard the gasket.

NOTE: The EGR valve sealing surfaces are soft metals.

1. To install, reverse the removal procedure.

1. Carefully clean all sealing surfaces and install a new EGR valve gasket.

Hi MIKE,maybe this PDFcan help you,Diagnostic Trouble Code Table ,good luck!

Check your EGR valve, check your PCV valve, check your mass airflow sensor and throttle body sensor.

egr position sensor. check items before you replace them, it gets expensive just guessing.

BUY A TIN OF EGR CLEANING SPRAY USE THE WHOLE TIN FOLLOWING INSTRUCTIONS THEN SEE IF THIS SORTS THE PROBLEM. ITS THE CHEAPEST FIRST FIX.

Is the code 401? Because if it is then it's not your egr its the sensor switch for the egr. It's located back by the firewall it is a black 1 1/2" x 2 1/2" rectangular shaped ,plastic and has a clipped plug on it's long side and it has 2 rubber sleaves coming out of bottom which slide over 2 vacuum lines to the egr and if this sensor has any moisture in it what so ever then you have to replace it. This sensor makes the egr valve open and close. And the tribute are famous for these sensors failing. The Ford part # is 4u7z-9j460-aa. Hope you find your problem.
Dan