Error Code P0475: What It Means & What To Do?

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Incorrect signal? OBD Error Code P0475? Does it all sound alarming to you? Don’t you worry! Not anymore. With Parts Avatar, we not only make your shopping easy but also help you fade the confusions. The OBD Error Code P0475 indicates a problem with the Exhaust Back Pressure Valve. The Exhaust Back Pressure Valve controls the Exhaust Back Pressure while the Engine is warming up and if during this the Engine Control Module PCM detects an incorrect signal from the Exhaust Control Pressure Valve, the PCM sets the code P0475.

The OBD-II Code Powertrain Control Module (PCM) failure can be determined as an Exhaust Pressure Control Valve "A"

This generic trouble code concerned strictly about the output circuit to the exhaust pressure control solenoid and is considered to be usually an electrical circuit fault only. This code being reasonably important needs the attention of the driver soon. To begin with, a scan tool is required to clear the diagnostic codes from the memory and see if the code returns back. If it does return the solenoid and its circuits need to be tested.

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

• Shortage of power in the power supply circuit connecting the exhaust pressure control solenoid and the PCM (powertrain control module).
• Disconnects or short openings in the power supply circuit between the exhaust pressure control solenoid and the PCM.
• Exhaust pressure control solenoid to power supply circuit short to the ground.
• Defective Exhaust Pressure Control Solenoid.
• A failure in the PCM (Although it’s least likely to happen).

1. Scan Tool - A Scan tool, often used to interface, diagnose and sometimes reprogram vehicle control modules is an integral unit. So, a faulty be should be replaced instantly to overcome the Error OBD Code P0475.
2. Exhaust Pressure Control Solenoid - Looking for a new Exhaust Pressure Control Solenoid? We at Parts Avatar, just for our clientele offer superior quality products at economical prices. So why not get your Exhaust Pressure Control Solenoid changed from there?
3. Exhaust Back Pressure Regulator - Facing the error code P0475? An inferior quality Exhaust Back Pressure Regulator can always be hazardous for the system also it is one of the primal causes behind the origin of the error code P0475. So, a bad one should be changed as soon as possible.
4. Indicator Lamp - A distorted Indicator Lamp can end up being the chief host inviting the Error Code P0475. So, replacing one can be one of the wisest decisions to avoid a problematic Exhaust Back Pressure Valve.

It is essential 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 P0475 here:

Common Symptoms

• An illuminated Malfunction Indicator Lamp.
• Shortfall of power.
• Deficient engine brakes.
• Longer time taken by the cold Engine to warm up.

Here are some ways with the help of which you will be able to correct the OBD Code P0475 –

To start with, the mechanic with a help of a Scan Tool should clear the diagnostic trouble codes from memory and wait to see if the trouble code further returns back. If the code doesn't return back, it probably indicates defective connections. And if the code does return back, the solenoids and its circuits need to be tested. Generally, the Exhaust pressure control solenoid is comprised of two wires and a harness going to the exhaust pressure control solenoid which should be disconnected. Using a Digital Volt Ohmmeter, one lead of the meter should be connected to one of the solenoid terminals. After then, the other meter lead to a different solenoid terminal should be connected. The solenoid shouldn't be shortened or disconnected, if turns out to be it should instantly be changed. Followed next the resistance specifications for the vehicle should be checked. Next it becomes important to see if there is 12V in the Exhaust Pressure Control Solenoid power supply circuit. It ignition needs to be checked and made sure that it’s on. If you fail to see 12 volts to the solenoid, or if there is 12 volts when the ignition is off, you will then need to relay to the solenoid or repair the wiring to the PCM.

In some of the cases, there are high possibilities of a broken PCM. But if that’s not the case, make sure you have a solid ground at the Exhaust Pressure Control Solenoid. In order to have this done a test light should be connected to a 12V battery positive (this will be the red terminal) and the other end of the test light should be touching to the ground circuit that goes to the Exhaust Pressure Control Solenoid circuit ground. If the test light FAILS to light up, you get the idea of the problem in the circuit. And if it DOES light up, shake up the wiring harness going to each sensor and observe test light if it does flicker or not. If it flickers, then you might have an intermittent connection. nonetheless, if you pass all these tests, and can still see the P0475 code flashing, you might have a failed Exhaust Pressure Sensor Control Solenoid.

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade Scan Tool, Exhaust Pressure Control Solenoid, Exhaust Back Pressure Regulator, Indicator Lamp and a lot more for our precious customers.

Here are some steps which you should follow in order to diagnose this P0475 fault code:

You might have observed problems with either the Exhaust Back Pressure (EBP) Device or the tube between the exhaust manifold and also the EBP sensor with an exhaust back pressure step test. That’s where the Engine Control Module takes the charge and then measures a particular preprogrammed pressure. Next it measures the time for pressure decay during the engine running test. It’s then if the ECM detects an EBP, Intake Air Temperature or Engine Oil Temperature sensor fault, the ECM deactivates the exhaust back pressure regulator. That’s exactly how you diagnose a malfunctioning exhaust pressure control valve and discover the reason behind its malfunctioning.

Common Mistakes When Diagnosing the P0475 Code

Curious on knowing how to appropriately diagnose the OBD Error Code P0475? Well, we listed here a few steps that should be kept in mind while performing the diagnoses.

This code P0475 can often be confused with an exhaust gas recirculation (EGR) code. Although the exhaust back pressure tube is located near the EGR Valve, the diagnosis of this code should be performed cautiously and in completely different manner.