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What will cause codes PO175 & PO300 on 2011 Dodge Grand Caravan?

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My friend has 2013 model with same problem. It spits and sputters and engine speed will sometimes bog down and then kick back in.

Vehicle: 2011 Dodge Grand Caravan 3.6L

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P0175 Fuel system rich Bank 2 Sensor 1

P0300 Random misfire

Running rich condition will do exactly the condition you have.A plugged air filter can cause this condition

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