How does the ECM control the purge valve?
The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn’t activated, the ECM should see a high voltage on the ground circuit.
What causes a purge control valve to open?
The ECM has commanded the purge control valve to open and detected either an incomplete open circuit or a short in the circuit. The cause of code P0443 can be a purge control valve internal open circuit or the connector is corroded causing loss of contact with the valve.
What causes a p0443 purge control circuit?
To cause a P0443, there has to be a problem with the purge control CIRCUIT , not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:
What is the diagnostic code for evaporative emission control?
P0443 is a diagnostic trouble code (DTC) for “Evaporative Emission Control System Purge Control Valve Circuit Malfunction”.
What causes purge control circuit to go bad?
To cause a P0443, there has to be a problem with the purge control CIRCUIT , not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly.
The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn’t activated, the ECM should see a high voltage on the ground circuit.
To cause a P0443, there has to be a problem with the purge control CIRCUIT , not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:
P0443 is a diagnostic trouble code (DTC) for “Evaporative Emission Control System Purge Control Valve Circuit Malfunction”.