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    Deere 850K Has Active Fuel Codes But I Cannot Find Codes In Service Advisor

    I'm working on a Deere 850K dozer, S/N 1T0850KXTFF290966. It will present active codes after operating for about 30 minutes, sometimes it will throw 1347.7 (high pressure fuel pump pressure control valve circuit fault) and sometimes it will throw 157.1 (rail pressure extremely low). I pulled...
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