Spark

DTC P0458 or P0459 - Without FX3

The evaporative emission (EVAP) canister purge valve is used to purge fuel vapour from the EVAP canister to the inlet manifold. The EVAP canister purge valve is pulse width modulated (PWM). Ignition voltage is supplied directly to the EVAP canister purge valve. The engine control module (ECM) controls the solenoid by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

P0458

The ECM detects an open/high resistance on the EVAP purge solenoid control circuit.

P0459

The ECM detects a short circuit to battery or a short circuit to ground on the EVAP purge solenoid control circuit.

DTC P0458 and P0459 are Type E DTCs.

DTC P0458 and P0459 are Type E DTCs.

Schematic Reference

Engine Controls Schematics : Siemens ECM - LPG with LCP → Siemens ECM - Gas without FX3 or LCP → Delphi ECM - FX3

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

1. With a scan tool, command the EVAP Purge Solenoid to 100 percent, and back to 0 percent. The Q12 evaporative emission (EVAP) purge solenoid valve should respond to the scan tool commands.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. 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) purge solenoid valve.
2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal B and ground.

⇒	If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all components connected to the ignition circuit and replace as necessary.

3. Ignition OFF, connect a test lamp between the control circuit terminal A and the ignition circuit terminal B.
4. Ignition ON, command the EVAP Purge Solenoid to 100 percent, and back to 0 percent with a scan tool. The test lamp should go from full brightness then dim until it goes off.

⇒	If the test lamp is always ON, test for a short circuit to ground on the control circuit. If the circuit tests normal, replace the K20 ECM.

⇒	If the test lamp is always OFF, test for a short circuit to voltage or an open/high resistance on the control circuit. If the circuit tests normal, replace the K20 ECM.

5. If all circuits test normal, test or replace the Q12 EVAP purge solenoid valve.

1. Ignition OFF, disconnect the harness connector at the Q12 evaporative emission (EVAP) purge solenoid valve.
2. Test for 18-28 between the ignition terminal B and the control terminal A.

⇒	If not within the specified range, replace the Q12 EVAP purge solenoid valve.

3. Test for infinite resistance between each terminal and the Q12 EVAP purge solenoid valve housing.

⇒	If not the specified range, replace the Q12 EVAP purge solenoid valve.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.