What does Code P0476 mean?
The Exhaust Pressure Control Valve controls exhaust back pressure during engine warmup. If the engine control module (PCM) determines there is an incorrect signal from the Exhaust Pressure Control Valve, the PCM will set code P0476.
Where is the exhaust pressure control valve located?
This valve can be found on the body of the turbo, and what it does is monitor the changes of exhaust pressure. It is then able to make the necessary changes to the vacuum. Without this part working properly, your engine will start to suffer as will the amount of exhaust your vehicle is producing.
What causes back pressure in a diesel engine?
Abstract: Exhaust system components such as mufflers and exhaust aftertreatment devices are a source of engine exhaust back pressure. Increased back pressure levels can cause increased emissions, increased fuel consumption, and can negatively affect engine performance.
Do diesels need a muffler?
A Diesel engine will run just fine without an exhaust system attached to it. A Diesel engine will run just fine without an exhaust system attached to it.
What does the p0476 code on the exhaust pressure sensor mean?
If all tests have passed so far, and you continue to get a P0476 code, this would most likely indicate a failed Exhaust Pressure sensor, although a failed PCM could not be ruled out until the sensor had been replaced.
What does the OBD code on the exhaust pressure sensor mean?
This code is strictly concerned about the incoming signal from the exhaust pressure sensor not matching intake manifold pressure, ambient air pressure or preprogrammed information during normal driving. This can be a mechanical or an electrical circuit fault, depending upon vehicle manufacturer.
What kind of engine does a Ford diagnostic trouble code apply to?
This generic powertrain/engine diagnostic trouble code typically applies to diesel engines, including but not limited to certain Ford, Dodge, Mercedes, Nissan, and VW vehicles. This code can also apply to those trucks equipped with diesel engines and dealer installed exhaust brakes.