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  1. P0340 - CMPS Reference Voltage

    Kia Carnival & Sedona 2006+
    Hi Everyone :) This is my first post on Kia-Forums so please be kind ;). I own a 2008 KIA Grand Carnival EX with a G6DA 3.8L engine. I do my own repairs and I am stumped at the moment with a P0340 error. The symptoms are hard starting, rough idle, misfiring, etc. A few weeks ago it went...
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