VAG Fault Codes & DTC List
Manufacturer and ECU-specific fault-code meanings. Check the stated ECU, model and code format against your diagnostic scan.
| Code | Meaning | Applicability |
|---|---|---|
| P0366 | 16750/P0366/000870 - Camshaft Position Sensor B Bank 1 (G300): Implausible Signal | OBD |
| P0366 | 16750/P0366/000870 - Camshaft Position Sensor B Bank 1 (G300): Implausible Signal | OEM |
| P0380 | Glow Plug/Heater (Q6) Circuit: Malfunction | DECIMAL |
| P0380 | Glow Plug/Heater (Q6) Circuit: Malfunction | OBD |
| P0380 | Glow Plug/Heater (Q6) Circuit: Malfunction | OEM |
| P0400 | Exhaust Gas Recirculation (EGR) System: Malfunction | DECIMAL |
| P0400 | Exhaust Gas Recirculation (EGR) System: Malfunction | OBD |
| P0400 | Exhaust Gas Recirculation (EGR) System: Malfunction | OEM |
| P0401 | Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected | DECIMAL |
| P0401 | Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected | OBD |
| P0401 | Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected | OEM |
| P0402 | Exhaust Gas Recirculation (EGR): Excessive Flow | DECIMAL |
| P0402 | Exhaust Gas Recirculation (EGR): Excessive Flow | OBD |
| P0402 | Exhaust Gas Recirculation (EGR): Excessive Flow | OEM |
| P0403 | Exhaust Gas Recirculation (EGR) Valve (N18): Malfunction | DECIMAL |
| P0403 | Exhaust Gas Recirculation (EGR) Valve (N18): Malfunction | OBD |
| P0403 | Exhaust Gas Recirculation (EGR) Valve (N18): Malfunction | OEM |
| P0407 | EGR Potentiometer (G212): Signal too Low | DECIMAL |
| P0407 | EGR Potentiometer (G212): Signal too Low | OBD |
| P0407 | EGR Potentiometer (G212): Signal too Low | OEM |
| P0408 | EGR Potentiometer (G212): Signal too High | DECIMAL |
| P0408 | EGR Potentiometer (G212): Signal too High | OBD |
| P0408 | EGR Potentiometer (G212): Signal too High | OEM |
| P0411 | DECIMAL | |
| P0411 | OBD | |
| P0411 | OEM | |
| P0420 | DECIMAL | |
| P0420 | OBD | |
| P0420 | OEM | |
| P0421 | DECIMAL | |
| P0421 | OBD | |
| P0421 | OEM | |
| P0422 | DECIMAL | |
| P0422 | OBD | |
| P0422 | OEM | |
| P0430 | Catalyst System; Bank 2: Efficiency Below Threshold | DECIMAL |
| P0430 | Catalyst System; Bank 2: Efficiency Below Threshold | OBD |
| P0430 | Catalyst System; Bank 2: Efficiency Below Threshold | OEM |
| P0431 | DECIMAL | |
| P0431 | OBD | |
| P0431 | OEM | |
| P0432 | Main Catalyst: Bank 2: Efficiency Below Threshold | OBD |
| P0432 | Main Catalyst: Bank 2: Efficiency Below Threshold | OEM |
| P0440 | EVAP Emission Control Sys: Malfunction | DECIMAL |
| P0440 | EVAP Emission Control Sys: Malfunction | OBD |
| P0440 | EVAP Emission Control Sys: Malfunction | OEM |
| P0441 | EVAP Emission Control Sys: Incorrect Flow | DECIMAL |
| P0441 | EVAP Emission Control Sys: Incorrect Flow | OBD |
| P0441 | EVAP Emission Control Sys: Incorrect Flow | OEM |
| P0442 | EVAP Emission Control Sys: Small Leak | DECIMAL |
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