Error code
OBD2 P0477
OBD2P0477
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Exhaust Pressure Control Valve Low.
Severity
moderateCan drive but may experience reduced performance and potential emissions issues.
Summary
P0477 indicates that there is an issue with the exhaust pressure control valve, specifically low input from this valve in the exhaust system.
Common Causes
- Wiring short to earth
- Faulty exhaust gas pressure control valve
Fixes
- Replace the faulty exhaust gas pressure control valve or repair wiring issues.
FAQ
What does P0477 mean?
P0477 indicates a problem with the exhaust pressure control valve, specifically low input from this valve.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0400Exhaust Gas Recirculation Flow
- P0401Exhaust Gas Recirculation Flow Insufficient Detected
- P0402Exhaust Gas Recirculation Flow Excessive Detected
- P0403Exhaust Gas Recirculation Control Circuit
- P0404Exhaust Gas Recirculation Control Circuit Range/Performance
- P0405Exhaust Gas Recirculation Sensor 'A' Circuit Low
- P0406Exhaust Gas Recirculation Sensor 'A' Circuit High
- P0407Exhaust Gas Recirculation Sensor 'B' Circuit Low
- P0408Exhaust Gas Recirculation Sensor 'B' Circuit High
- P0409Exhaust Gas Recirculation Sensor 'A' Circuit
- P0410Secondary Air Injection System
- P0411Secondary Air Injection System Incorrect Flow Detected