P0475 Code - Exhaust Pressure Control Valve Malfunction 'A'
Quick Answer
Exhaust Back Pressure Regulator - Is a variable position valve that controls exhaust back pressure during cold ambient temperatures to increase cab heat and decrease the amount of time needed to defrost the windshield. Common causes include Faulty Exhaust Back Pressure Valve, Exhaust Back Pressure Valve harness is open or shorted, Exhaust Back Pressure Valve circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0475 indicates Exhaust Pressure Control Valve Malfunction 'A'.
- Common causes
- Common causes include Faulty Exhaust Back Pressure Valve, Exhaust Back Pressure Valve harness is open or shorted, Exhaust Back Pressure Valve circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0475 Description
Upon each initial engine start-up, the ECM exercises the exhaust back pressure valve by commanding it to cycle on and off once. If upon start-up the temperature of intake air sensed by the Intake Air Temperature (IAT) sensor is < 37°F (5°C) and the oil temperature sensed by the Engine Oil Temperature (EOT) sensor is between 32°-140°F (0-60°C) it will continue to keep the back pressure valve partially closed. As the oil temperature rises during engine operation, the ECM will control the valve in response to the rising oil temperature.
What are the Possible Causes of the DTC P0475?
- Faulty Exhaust Back Pressure Valve
- Exhaust Back Pressure Valve harness is open or shorted
- Exhaust Back Pressure Valve circuit poor electrical connection
How to Fix the DTC P0475?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0475 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Get the P0475 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P0475 Audi — Exhaust Pressure Control Valve Malfunction 'A'
- P0475 BMW — Exhaust Gas Flap Activation
- P0475 Dodge — Exhaust Pressure Control Valve Malfunction 'A'
- P0475 Ford — Exhaust Pressure Control Valve Malfunction
- P0475 Mercedes-Benz — Exhaust Pressure Control Valve Malfunction
- P0475 MINI — Exhaust Gas Flap Activation
- P0475 Volkswagen — Exhaust Pressure Control Valve Malfunction 'A'
Frequently Asked Questions about P0475 Code
What does the OBDII code P0475 mean?
1. P0475 indicates a malfunction in the exhaust pressure control valve 'A,' which helps regulate exhaust backpressure for optimal engine performance. 2.
What are common symptoms of the P0475 code?
Symptoms may include reduced engine performance, poor fuel efficiency, excessive exhaust smoke, or an illuminated check engine light. 3.
What causes the P0475 code to appear?
Common causes include a faulty exhaust pressure control valve, wiring or connector issues, carbon buildup in the valve, or an ECM/PCM malfunction. 4.
Can I drive my car with a P0475 code?
While the car may still be drivable, ignoring this code can lead to reduced engine performance and potential damage to the exhaust or engine systems. 5.
How is the P0475 code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the exhaust pressure control valve, check related wiring and connectors, and test the valve's operation. 6.
What repairs can fix the P0475 code?
Repairs may include cleaning or replacing the exhaust pressure control valve, repairing wiring or connectors, or updating/reprogramming the ECM/PCM if needed. 7.
How much does it cost to repair the P0475 code?
Repair costs can range from $150 to $500, depending on whether the valve needs cleaning or replacement and labor rates in your area. 8.
Can I fix the P0475 code myself?
If you're comfortable with basic automotive repairs, you can inspect and clean the exhaust pressure control valve and check for wiring issues. For more complex issues, consult a professional. 9.
What tools are needed to troubleshoot the P0475 code?
You'll need an OBDII scanner, a multimeter for testing electrical connections, and basic hand tools to access and inspect the valve. 10.
Will clearing the P0475 code with an OBDII scanner fix the problem?
Clearing the code may temporarily turn off the check engine light, but it won't address the underlying issue causing the malfunction.
Discuss the causes and fixes for P0475 OBDII Code
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