EVAP system codes
Fuel vapor leaks, purge and vent valve codes. 14 codes, each with symptoms, causes, diagnosis steps and repair cost estimates.
P0440Evaporative Emission SystemP0441Evaporative Emission System Incorrect Purge FlowP0442Evaporative Emission System Leak Detected (Small Leak)P0443Evaporative Emission System Purge Control Valve CircuitP0446Evaporative Emission System Vent Control CircuitP0449Evaporative Emission System Vent Valve/Solenoid CircuitP0451Evaporative Emission System Pressure Sensor/Switch Range/PerformanceP0452Evaporative Emission System Pressure Sensor/Switch LowP0453Evaporative Emission System Pressure Sensor/Switch HighP0455Evaporative Emission System Leak Detected (Large Leak)P0456Evaporative Emission System Leak Detected (Very Small Leak)P0457Evaporative Emission System Leak Detected (Fuel Cap Loose/Off)P0496Evaporative Emission System High Purge FlowP0497Evaporative Emission System Low Purge Flow