P0458

DTC P0458: Evaporative Emission (EVAP) Purge Solenoid Control Circuit Low Voltage

Wiring Diagram:

Circuit Description
The Evaporative emission (EVAP) canister purge valve is used to purge fuel vapor from the EVAP canister to the intake 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.

Conditions for Setting the DTC
- Engine is running.
- Ignition voltage is between 11 and 16 V.
- Enable time delay is greater than 0.5 seconds.

Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.

Conditions for Clearing the MIL/DTC
- The MIL will turn OFF after four consecutive validation cycles in which the diagnostic runs without a fault.
- A history DTC will clear after 40 consecutive warm up cycles without a fault.
- The DTC(s) can be cleared by using the scan tool.

Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
1. This step determines if the condition exists.
2. This step tests the feedback voltage from the ECM. If a voltage is not available, this indicates an internal ECM condition.
3. This step tests the ignition 1 voltage circuit to the EVAP canister purge valve.

Step 1-7:

Step 8-12:

Troubleshooting