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P1487 Mazda -6 after egr and small hose replacement dtc p1487 persists

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continuous p1487 dtc. had other egr codes but after replacing egr only dtc p1487 remains. thoroughly tested egr solenoid. is getting power and circuit to pcm at #47 is good. replaced small hoses also

Vehicle: 2003 mazda 6 3.0 liter

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P1487 EGR boost solenoid valve circuit malfunction.

This is for the Boost solenoid of the EGR.

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