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Egr underflow pc0401 error on a 97 merc mountaineer w130000 have replaced the egr valve and egr solenoid with no change what else could be wrong?

Updated: 10/26/2022

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∙ 16y ago

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DPFE sensor Ford has tons of them stocked

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∙ 16y ago

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Q: Egr underflow pc0401 error on a 97 merc mountaineer w130000 have replaced the egr valve and egr solenoid with no change what else could be wrong?

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Egr underflow pc0401 error on a 97 merc mountaineer w130000 have replaced the egr valve and egr solenoid with no change what else could be wrong?

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