P0443

Diagnostic Chart:

Schematic:

The EVAP purge valve serves to deliver fuel vapor from the canister to the intake manifold. The purge solenoid is pulse width modulated when the ECM commands it to empty the canister. The voltage on the solenoid control circuit is monitored continuously. If the voltage should fall below a lower threshold, this DTC will set.

DTC PARAMETERS
DTC P0443 will set when:
^ Battery Voltage is between 7.5 and 15 volts
^ Engine speed greater than 40 rpm
^ A low voltage condition exists on the control circuit

DTC P0443 is a (type B) DTC.

DIAGNOSTIC AIDS
To locate an intermittent problem, use the Scan tool to monitor the actual EVAP purge solenoid with engine running.

Wiggling wires while monitoring the EVAP purge solenoid may locate the area where a short to ground exists.