The exhaust pressure control valve controls exhaust back pressure during cold start warm-up. This valve sits along the exhaust stream and is used to generate heat and oppose cylinder pressure from the engine. If the powertrain control module (PCM) detects an issue with the exhaust pressure control valve, it will set code P0475.
Diagnostic trouble code P0475 stands for “Exhaust Pressure Control Valve ‘A.’”
The exhaust pressure control valve plays an important role in some diesel exhaust systems. When the engine is cold, this valve controls back pressure so that the cabin can warm up more quickly.
A back pressure signal is also sent to the exhaust pressure control valve. If there is an issue with the control valve, the PCM might log a P0475 code.
Note: The definition of code P0475 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
P0475 is a generic powertrain code that can be logged in vehicles with an OBD-II system. However, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications.
Diagnosing trouble codes also involves using certain tools and conducting visual inspections on certain parts. If you’re new to the procedure, it might be best to have a certified mechanic do the job for you instead. But if you know how to work your way around diagnosing trouble codes, then you can go ahead and do it yourself.
To help you get started, here is a video that shows what the process usually involves.
Attempting to fix a P0475 code can be frustrating if you don’t have the technical knowledge and DIY skills to fix the problem yourself. Under these circumstances, it might be best to have a trained professional do the job for you.
But if you’re a seasoned DIYer, make sure to have the right tools and information before you begin working on your vehicle. Guides like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information, which can be handy in resolving trouble codes like the P0475.
Failing to address DTC P0475 leads to many problems including, but not limited to, poor engine performance and braking problems. If you’ve confirmed that a faulty exhaust pressure control valve triggered the code, don’t put off replacing it. Find a compatible replacement at CarParts.com with just a few clicks.
The best part? You can get your hands on a new exhaust pressure control valve without leaving your house. Simply visit our website and use our vehicle selector to check out compatible parts. Then, funnel the catalog results according to your preferences using the search filters.
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