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1996 Cadillac El Dorado Northstar 4.6l No Start Codes P1645 and P0603

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No start engine cranks, no power to 20amp fuel pump fuse .fuses and relays r good. What should I check next?

Vehicle: 1996 cadillac Eldorado northstar4.6l

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P1645 CADILLAC - Evaporative Emission Vent Solenoid Control Circuit

Read more: https://www.autocodes.com/p1645_cadillac.html

P0603 CADILLAC - Control Module Long Term Memory Reset

Read more: https://www.autocodes.com/p0603_cadillac.html

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