I t means you have something wrong with your emissions. Check the hose that goes from the Evap Valve (usually a round plastic valve) to Throttle body. Maybe is too soft and when there is a vacuum it clogges.
Trouble code P0446 means: Evaporative Emission System Vent Control Circuit
P0456 Evaporative emission system leak detected (very small leak)taken from canobd2 reader.P0456 = EVAP Emission Control System Leak, very small. Could be as simple as a loose of faulty fuel cap.P0456 = EVAP Emission Control System Leak, very small. Could be as simple as a loose of faulty fuel cap.
secondary fuel injection system -airpump ac
P0441 Evaporative Emission Control System Incorrect Purge Flow A code P0441 could mean one or more of the following has happened: * Bad vacuum switch * Broken or damaged EVAP line or canister * Open in PCM purge command circuit * Open or short in Voltage feed circuit to Purge Solenoid * Faulty purge solenoid * Restriction in EVAP solenoid, line or canister * Corrosion or resistance in purge connector * Bad PCM
The P1135 is set when the Engine Control Module detects a heated oxygen sensor heater circuit malfunction. This could be caused by a faulty air-fuel ratio sensor or a faulty engine control module.
evaporative emission control sytem purge control circuit malfunction
Evaporative Emission Control System Vent Control Circuit Malfunction
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction Cheers
Evaporative Emission Control System Purge Control Valve Circuit Malfunction.
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction
Evaporative Emission Control System Purge Control Valve Circuit Malfunction.
Trouble code P0446 means: Evaporative emission control system, vent control circuit malfunction
where is the evaporative emission system vent control circuit in chevy impala (200)
Evaporative Emission Control System Vent Control Circuit Malfunction, look for faulty vent valve or a short on the vent control circuit.
Evaporative Emission Control System Malfunction
If the sensor is dead, it's about $200-300.