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    Chevy Sonic LTZ 1.8L doing 17- 20 mpg

    Check your engine temperature, if it is running too cold it will consume a lot of fuel, get a scan done looking at the datastream it may show if fuel mixture is running with low oxygen i doubt you are getting misfires as almost everything is new.
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    Sonic Overheating

    That looks like something is stuck in the coolant pathways as that vent is a pressure vent, that plastic tube connection look where it goes and maybe your problem will be there as you changed the water pump and the thermostat the problem is either there, in the radiator, oil cooler( i doubt this...
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    1.8L VIN H 2012 LS with P0481 COOLING system diagram please

    Greetings, I got lucky enough to get my 1st problem with this car with a generic code (Cooling fan 2 Control Circuit Malfunction), this car only has 1 fan with 2 speeds, as soon as Engine stats Fan starts and stays in a single speed all the time making engine run at high temperatures in high...
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    Check Engine Light

    look, code p0171 means near cylinder 1 there is an oxygen sensor thats the one that triggers p0171 the maf sensor is before the engine air filter is to the left you will see the cable as soon as you look that way is the upper most cable to the left. Scotty has a cool video about how to clean it...
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