Exhaust Pressure Control Valve Circuit
The P0475 code means the vehicle's onboard diagnostic system has detected: Exhaust Pressure Control Valve Circuit. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $600 (parts and labor)
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What Are the Symptoms of P0475?
- Check Engine Light on
- Turbo performance reduced
- DPF regeneration issues on diesel
- Exhaust brake may not function
What Causes P0475? (Most Likely First)
- Faulty exhaust pressure control valve Very High
- Damaged wiring to control valve High
- Valve stuck from carbon/soot buildup Moderate
- PCM driver circuit failure Low
Can I Still Drive with P0475?
Short distances only. P0475 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is the exhaust pressure control valve?
It controls exhaust back pressure for turbo efficiency, DPF regeneration, and exhaust braking on diesel vehicles.
Can P0475 affect the exhaust brake?
Yes, many diesel trucks use the exhaust pressure control valve for exhaust braking. A faulty valve will disable this feature.
Is the valve expensive to replace?
The valve costs $100-$300 depending on the vehicle. Labor is $100-$300 due to its location in the exhaust system.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0475?
-
Command exhaust pressure control valve with scan tool and monitor response.
-
Measure valve solenoid resistance. Compare to spec.
-
Inspect valve for carbon/soot buildup that may cause sticking.
-
Check wiring and connector for damage.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0475?
- 2010-2020 Ford F-250 (6.7L Diesel)
- 2012-2019 Ram 2500 (6.7L Cummins)
- 2008-2018 Chevrolet Silverado 2500 (6.6L Duramax)
- 2011-2020 GMC Sierra 2500 (6.6L Duramax)
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