Exhaust Pressure Control Valve Malfunction
P0475 — Exhaust Pressure Control Valve Malfunction
System: Powertrain | Type: Generic (OBD-II Standard) | Make: Generic
P0475 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.
Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.
Because P0475 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.
The Powertrain Control Module (PCM) sets this code when it detects a malfunction in the exhaust pressure control valve circuit. This valve regulates exhaust backpressure to optimise EGR operation and turbocharger efficiency (if equipped). A failure may result from electrical faults, valve malfunctions, or mechanical restrictions affecting its operation.
Detailed possible causes for P0475 are available to TaT members.
Unlock with Free TrialStep-by-step diagnostic guidance for P0475 is available to TaT members. Our Diagnostic Assistant provides professional-level troubleshooting procedures written by experienced technicians.
Unlock with Free Trial| Code | P0475 |
| System | Powertrain |
| Type | Generic (OBD-II Standard) |
| Make | Generic |
| Causes | Available |
| Diag. Assistant | Available |
| Video | — |
Get complete diagnostic info, causes, and repair guidance.
Start Free 7-Day Trial Member LoginSearch all 8,602 fault codes with complete diagnostic details, possible causes, and repair guidance.
Start Your Free 7-Day Trial Member Login© 2026 The Automotive Technician (TaT) — www.tat.net.au