Are you experiencing a significant reduction in engine performance accompanied by fouling of spark plugs? Is your vehicle exhaust system emitting excessive smoke? If your answer is YES, then chances are that your vehicle is set to OBD error code P0039. Now, you must be wondering what is this P0039 code? What does it mean? Well to get your answers to all the questions you will need to go through our subsequent sections. Parts Avatar offers best solution for your car’s needs. Our online parts store is open for your orders 24/7.