Cruze

DTC P0443, P0458, or P0459

An ignition voltage is supplied directly to the EVAP canister purge solenoid valve. The engine control module (ECM) grounds the EVAP canister purge solenoid valve control circuit through an internal switch called a driver. The ECM monitors the status of the driver. The EVAP canister purge solenoid valve is pulse width modulated (PWM). A scan tool will display the amount of ON time as a percentage.

P0443 00

PWM signal is between 8.2 and 99%

P0458 00

PWM signal is less than 99%

P0459 00

PWM signal is greater than 0.3%

DTCs P0443 00, P0458 00 and P0459 00 are Type B DTCs.

DTCs P0443 00, P0458 00 and P0459 00 are Type B DTCs.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Evaporative Emission Control System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Ignition OFF, disconnect the harness connector at the Q12 evaporative emission (EVAP) canister purge solenoid valve.
2. Ignition ON, verify that a test lamp illuminates between the voltage supply circuit terminal 2 and ground.

⇒	If the test lamp does not illuminate, test the voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal and the voltage supply circuit fuse is open, test or replace the Q12 Evaporative Emission (EVAP) Purge Solenoid Valve.

3. Ignition OFF, test for more than 500 kΩ between the control circuit terminal 1 and ground.

⇒	If less than the specified range, repair the short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

4. Ignition OFF, test for less than 0.3 V between the control circuit terminal 1 and ground.

⇒	If more than the specified range, repair the short to B+. If the circuit tests normal, replace the K20 Engine Control Module.

5. Ignition OFF, disconnect the K20 Engine Control Module. Test for less than 5 Ω between the Q12 Evaporative Emission (EVAP) Purge Solenoid Valve connector terminal 1 and the K20 Engine Control Module terminal 15 X1.

⇒	If more than the specified range, repair the open circuit. If the circuit tests normal, replace the K20 Engine Control Module.

Static Test

Ignition OFF, disconnect the harness connector at the solenoid. measure for 10-30 Ω between the voltage supply terminal 2 and the control circuit terminal 1.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.