P0475 Code 7.3 Powerstroke

When using a 7.3L Powerstroke for an extended period of time, one should be aware of the Diagnostic Trouble Codes (DTCs) that may arise. The P0475 Code 7.3 Powerstroke is related to the Exhaust Back Pressure Valve and can cause confusion if it appears on your screen. This article provides readers with detailed information about this error code, starting from its definition to possible solutions.

What Does P0475 Code Means On 7.3L Powerstroke?

P0475 is a Diagnostic Trouble Code (DTC) for Ford 7.3L Powerstroke engines. It references an Exhaust Back Pressure Control Valve Malfunction, which serves to generate heat through back pressure during engine warm-up in cold/snowy areas. When the ECM detects any issue with the valve, it will produce the P0475 code and may indicate faulty wiring or damaged valve sensors as causes of the error.

Symptoms Of Getting The P0475 Code 7.3 Powerstroke

P0475 is a diagnostic trouble code that may be experienced on other 7.3L engines, with specific common symptoms associated with it. This error code should be expected if the vehicle exhibits any of these symptoms.

• Their CEL is illuminated;
• They experience a lack of engine power;
• The RPMs are irregular;
• It takes unexpectedly more time for the cold engine to warm up; and
• The engine won’t start at all in rare scenarios.

When this error code is detected, the warning or check engine light may not always be activated. Therefore, it is necessary to use a scanner and note other symptoms to interpret the error code correctly.

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The Causing Factors Of The Error Code P0475

The exhaust back pressure control valve can be subject to malfunctioning for various reasons. P0475 is an error code commonly associated with such malfunctions and may be caused by various factors.

1. Its faulty wiring of PCM and Exhaust Pressure Control Solenoid can be detrimental.
2. Damage to the Exhaust Back Pressure Valve is a possible occurrence.
3. An EBPV Harness that is shorted or open can create an issue.
4. Poor Electrical Connection of the EBPV could lead to complications in its performance.
5. A faulty Powertrain Control Module, though rare, may also exist as a scenario in some instances.

This error code is most commonly caused by a damaged exhaust back pressure valve.

How Serious Is Code P0475 On 7.3L Powerstroke?

P0475 is indicative of a moderately serious issue on the 7.3L Powerstroke diesel engine. If left unresolved, it can cause continuous damage to the powertrain, eventually leading to more costly repairs. Therefore, it is recommended that the code be addressed as soon as possible to avoid further damage and expense.

How To Solve P0475 Error Code On 7.3L Powerstroke?

The error code can be solved independently with the necessary equipment. It is important to have the appropriate items listed in order to achieve this goal successfully.

• Scanner
• Electrical Contact Cleaner Or 91% Rubbing Alcohol
• DVOM or Digital Volt/Ohm Meter
• Test Light Bulb

Once the equipment is ready, troubleshooting can begin:

Check The Technical Service Bulletin

Before investing time and money, it is advised to check if the exhaust back pressure control valve manufacturer is running a recall campaign for its malfunctioning model. Investigating the Technical Service Bulletin should be done first, as it may show that there exists an ongoing program relating to this issue. If so, congratulations! Otherwise, alternative methods should then be pursued.

Check Wirings & Connectors The Solenoid

The exhaust back pressure valve should be located at the front part of the turbo pedestal. Once identified, the wirings must be visually inspected to ensure they function correctly.

• Wirings: This wiring should be checked for any signs of damage. The wires and plastic components should be examined for any burnt or melted areas.
• Connectors: The user should look for unusual-colored (greenish) connectors and inspect them for any signs of burns or corrosion.
• How To Fix: Terminal cleaning should be done with an electrical contact cleaner, or if unavailable, 91% rubbing alcohol can be used as well. The terminals must be thoroughly cleaned to ensure optimal performance of the system.
• Caution: The terminal must be dried completely before beginning the cleaning process. Additionally, a dielectric silicone element should always be used to make contact with the terminals.

The scanner must be used to reset the error code. If this does not succeed, the wiring and connectors are likely to be faulty in nature. When a successful reset is achieved, subsequent diagnostic methods can then be employed.

📢Read also: P1211 Code 7.3 Powerstroke

Check EBPV Power Supply Circuit

It is recommended that the pressure valve power supply should carry 12V power. To verify its functionality, a test bulb should be connected to the red terminal and the ground circuit, to see if it lights up.

Scenario 1:

• If the bulb does not illuminate, the circuit has an issue. Replacing the power supply circuit may be necessary if this is the case.

Scenario 2: 

• The harness lighting up and flickering when shaken is indicative of a wiring issue. Re-checking and replacing the wirings should resolve this code.

Check the Circuit Of The Solenoid

The volt-ohm meter can be utilized to check the power supply circuit in two steps. The instructions for doing so are provided below.

• Step 1: The wire connecting the harness with the pressure control solenoid must be detached. (There are two wires in the EBPV)
• Step 2: The DVOM meter should be utilized to determine whether the solenoid is open or shorted.

If it is found that the solenoid is open or shorted, it should be replaced to resolve the error code.

Check & Replace Your PCM

Suspecting the PCM to be faulty or damaged should be considered if no other solutions are working. Expert assistance is recommended for replacing or re-inspecting the total condition of the truck.

How Much Does It Cost To Solve The Error Code P0475?

This error code’s fixing cost depends on which part/s requires replacing during the resolution process. This price list provides a better understanding of the necessary replacements:

• Electrical Contact Cleaner Costs $5 to $10
• Wirings & Connectors Costs $100 to $1000
• The exhaust Back Pressure Control Valve Costs $30 to $40
• The PCM Costs Around $500

It is important to note that an additional fee of $75 to $150 per hour may be incurred if getting the fix done from an auto store.

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Common Mistakes While Solving The P0475 Code

One must consider avoiding common mistakes when solving a Ford 7.3L engine P0475, no matter their level of knowledge on the subject. Adhering to this advice can help prevent any potential errors from occurring in the process.

1. Fails to check TSB before making any engine modifications.
2. Does not possess knowledge of the appropriate way to use a digital volt/ohm meter.

Additional Comments To Consider Regarding The P0475 Code

One may find it possible to fix the error code P0475 without professional help. However, if difficulty arises during the process, seeking assistance from an expert technician at a nearby auto shop is highly recommended.

Conclusion

This article has provided sufficient information to answer any questions pertaining to DTC P0475. The necessary components can be found and replaced in order to fix the code. Having a scanner and volt-ohm meter at home is recommended to troubleshoot this type of error code; if these items are unavailable, they may be borrowed from a nearby auto shop.