P0476 OBD Error Code: Problem & Solutions

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Baffled between these complex words? No worries, Parts Avatar to the rescue! This little guide is surely going to help you in getting started again. This generic trouble code strictly focuses on the incoming signal from the Exhaust Pressure Sensor not matching the intake manifold pressure, ambient air pressure or preprogrammed information during the usual driving. To further elaborate, It is during the exhaust back pressure step test, when the engine control module (ECM) instructs and measures a preprogrammed exhaust pressure and then measures time taken for pressure decay during the vehicle’s engine running test. Getting there? Okay, so after this the exhaust back pressure step recognizes the complications concerned with the exhaust back pressure (EBP) device or the tube that sits between the exhaust manifold and the EBP sensor. When a fault is witnessed in the exhaust back pressure (EBP), intake air temperature (IAT), or engine oil temperature (EOT) sensor, the ECM ends up disabling the exhaust back pressure regulator. Hence, causing the P0476 code to pop up. So far so good? But we’ve got you extra, pull yourself up and join us in the ride.

The collapsing or malfunctioning of the OBD-II Code Powertrain Control Module (PCM) is marked as an Exhaust Pressure Control Valve "A" Range/Performance

The Exhaust Pressure Control Valve is in charge of controlling exhaust back pressure while the engine is warming up. If the engine control module (PCM) detects an incorrect signal from the Exhaust Pressure Control Valve, the error code P0476 is set by the PCM.

What causes this problem with the Exhaust Pressure Control Valve "A" Range/Performance

• A jammed Exhaust Back Pressure Valve.
• Distorted, blocked or a wrongly adjusted turbocharger wastegate.
• Leakage or clogging caused in the exhaust system.
• A fault in the Exhaust Gas Pressure Sensor.
• Ruptured PCM (Even though its least likely to happen).

1. Exhaust Gas Pressure Sensor - A differential sensor measuring the pressure difference between gas in both the intake and the outtake, is an essential part to overcome the problems created by Error code P0476. So, a faulty one should be changed immediately.
2. Exhaust Back Pressure Valve - Having problems with the Exhaust Back Pressure Valve? Don’t you worry, Parts Avatar has it all. A blocked Exhaust Back Pressure Valve could end up being the root cause behind the Error code P0476. So, get yours changed now.
3. Cam Sensor - Get your Error Code fixed instantly with a new Cam sensor. Parts Avatar is just the right place that provides the best fuel regulators across the country at highly economical prices.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0476 here:

Common Symptoms

• Radiating Malfunction indicator Lamp.
• Insufficient power.
• Deficient brakes of the Engine.
• The engine a taking longer time than the usual to warm up.

Want to correct the Trouble Code P0476? Read these points mentioned below:

The error because of having several issues is often considered to be quite complicated. So, a thorough diagnostic test becomes quite essential to overcome the Error Code P0476 and to begin with the repairs. To start with, the torque converter installed might need a replacement and you may need to clean the port to the right side of the exhaust manifold. A cam sensor malfunction might be the reason, if the car struggles when put to into gear. Although it may be the best to begin with the small and minor repairs. And if these fail to provide a solution, then you should start with the larger and complicated tasks such as replacing the components on the vehicle.

Parts Avatar Canada is here to solve all your issues related to car parts. We have stocked a wide range of best priced Exhaust Gas Pressure Sensor, Exhaust Back Pressure Valve, Cam Sensor and a lot more to help you out in fixing your car.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0476 code to be stored:

The vehicle’s exhaust back pressure regulator being at a varying position, controls the exhaust back pressure during the cold temperatures. This is done in order to increase the heat to the vehicle’s cab and decrease the duration of time required to unfreeze the windshield. Similarly, the engine control module (ECM) uses the vehicle’s measures exhaust back pressure, engine oil temperature, intake air temperature and engine load to measure and ascertain the amount of pressure that is required. The vehicle's valve position can be controlled by switching the output signal circuit in your ECM to 12 volts. After this, if you start the engine and the temperature of intake air on the Intake Air Temperature (IAT) sensor is measured less than 37°F (5°C) and the oil temperature is measured somewhat in between 32°-140°F (0-60°C), the vehicle will continue to keep the back-pressure valve partially closed. The oil temperature rises as the engine runs, the ECM also adjusts the valve in response to the rising oil temperature.

These will be the areas that will be thoroughly investigated by the mechanic. The diagnostic equipment used by him/her could be something beyond your access. So, to avoid any complications, it becomes an essential task to visit a trained professional as far as your vehicle is concerned. Even at any point in time, if you decide to take the task in hands, it should only be undertaken after extensive knowledge of the vehicle. When handling the vehicle's in your hand, you should always be cautious about the potential hazards.

Common Mistakes When Diagnosing the P0476 Code

Wondering on how to diagnose the Error code P0476 accurately? No worries! Parts Avatar is here to help. Here listed are a few basic mistakes that should be kept in mind while diagnosing the error code P0476.

This code can frequently be confused with the Exhaust Gas Recirculation (EGR) code. Even though the positioning of the exhaust back pressure tube may be near the EGR valve, it should be diagnosed in a completely different manner.