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P1406 CHEVROLET -

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i have 99 s10 4wheel drive code 1406 poped up replaced the egr valve and the code is still popping up checked the wiring to the pcm showed good did a percentage test on it computer responded to it this probelm started right after i changed the fuel pump out

Vehicle: 99 s10 Chevrolet 4.3 v6

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