P0475 OBD-II Trouble Code: Exhaust Pressure Control Valve Malfunction

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0475 code

P0475 is a diagnostic trouble code (DTC) for "Exhaust Pressure Control Valve Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0475 DIAGNOSTIC Get a fair and transparent estimate upfront

What the P0475 code means

The P0475 means that there is something wrong with your exhaust back pressure valve.

What causes the P0475 code?

There may be more than one cause for the P0475 code. One is a faulty exhaust back pressure valve. Another cause may be that the exhaust back pressure valve is shorted out or open. You may also have a poor electrical connection on your exhaust back pressure valve.

What are the symptoms of the P0475 code?

Your Check Engine light may come on to tell you that your car is having issues with its exhaust valve.

How does a mechanic diagnose the P0475 code?

You can detect problems with either the Exhaust Back Pressure (EBP) Device or the tube between the exhaust manifold and the EBP sensor with an exhaust back pressure step test. This is when the Engine Control Module (ECM) commands and then measures a particular preprogrammed pressure. It then measures time for pressure decay during your engine running test. If the ECM detects an EBP, Intake Air Temperature or Engine Oil Temperature sensor fault, the ECM will disable the exhaust back pressure regulator. This is how you know that you probably have an exhaust pressure control valve malfunction and just what exactly is malfunctioning.

How serious is the P0475 code?

A P0475 code is moderately important. It may not need your immediate attention, but as is true with most car repairs, if you do not take care of the problem quickly, it could cause you additional problems in the future. However, you will still be able to operate your vehicle.

What repairs can fix the P0475 code?

If you have a scan tool, clear the diagnostic trouble codes from memory, and see if the P0475 code returns. If it does not return, then faulty connections are most likely the issue. If the code does return, you will need to test the solenoid and its circuits. Usually there are two wires at the Exhaust Pressure Control Solenoid, and you must first disconnect the harness going to the Exhaust Pressure Control Solenoid. With a Digital Volt OhmMeter, connect one lead of the meter to one of the solenoid terminals. Then connect the other meter lead to the other solenoid terminal. Please note that it should not be open or shorted. Next check the resistance specifications for your particular vehicle. If the solenoid is either shorted or open, you will need to replace the solenoid. Next you will need to determine if you have 12V on your Exhaust Pressure Control Solenoid power supply circuit. Make sure that your ignition is on. If you do not see 12 volts to the solenoid, or if there is 12 volts when the ignition is off, you will need to relay to the solenoid or repair the wiring to the PCM.

In some cases, you may have a bad PCM. But if this is not the case, make sure you have a solid ground at the Exhaust Pressure Control Solenoid. To do this connect a test light to a 12V battery positive (this will be the red terminal) and touch the other end of the test light to the ground circuit that goes to the Exhaust Pressure Control Solenoid circuit ground. If the test light DOES NOT light up, you know you have a problem circuit. If it DOES light up, shake the wiring harness going to each sensor and note if the test light flickers. If it does flicker, you have an intermittent connection. However, if you pass all of these tests and are still receiving a P0475 code, you probably have a failed Exhaust Pressure Control Solenoid.

Additional comments for consideration regarding the P0475 code

Many older vehicles have temporary sensor problems that occur due to prolonged stress on the drivetrain. A P0475 is very difficult to diagnose and repair, and so you might want to consult with a professional before taking this on yourself. While you can still operate your vehicle, you should consider fixing this issue as soon as you can.

Need help with a P0475 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P0475

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0475 code.

SCHEDULE P0475 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P3400 OBD-II Trouble Code: Cylinder Deactivation System Bank 1
P3400 trouble code definition The P3400 diagnostic trouble code indicates that there is a performance issue with the Cylinder Deactivation System in...
P2018 OBD-II Trouble Code: Throttle Actuator Control Module Performance
P2108 P2108 code definition Throttle actuator control module performance What the P2108 code means This trouble code indicates that the powertrain control module has detected a malfunction with the throttle body control motor or module. This code is only found...
P2440 OBD-II Trouble Code: Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2440 code definition The P2440 diagnostic trouble code is an indication that the Powertrain Control Module (PCM) has detected that the switching...

Related questions

Check Engine and Traction Control lights on
Even though there are two lights on, there is probably one problem. Traction control uses 3 things when detecting wheel spin. It uses the ABS to brake the wheel that is spinning, engine power is reduced, and it uses the...
Code is P02990 what does it mean?
Hello, thanks for writing in about your Buick Cascada. Trouble code P0990 is a transmission fluid pressure fault. Possibly an internal fault in the transmission or there is a fluid leak (https://www.yourmechanic.com/services/transmission-fluid-is-leaking-inspection). If the car didn't make it home, I...
I went to AAmco because my engine light was on! They did a diagnostic and came up with 2 codes. intake runner position sensor cir
Diagnostic Trouble Codes, such as the two codes that were retrieved at the first shop, cannot be used to "directly" condemn parts. Rather, these Codes are merely clues that are used to inform an actual diagnostic. But, short of an...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com