Purge Control Solenoid Valve | How to test and replace at home! | P0458 P0459

Introduction

This tutorial will guide you through testing and replacing a purge control solenoid valve at home. The purge control solenoid valve is crucial for vehicle emissions control, and understanding how to work with it can help you troubleshoot issues like rough idling and engine hesitation. This guide will cover the location of the valve, how to test its functionality, and steps for replacement if needed.

Step 1: Locate the Purge Control Solenoid Valve

• Identify the Location:
  • The purge control solenoid valve is typically found near the engine, often mounted on or near the intake manifold.
  • Consult your vehicle's manual for the exact location for your specific model.

Step 2: Remove the Purge Control Solenoid Valve

• Gather Tools:
  • You'll need a trim removal set and hose pliers.
• Disconnect Electrical Connector:
  • Carefully unplug the electrical connector from the solenoid.
• Remove the Valve:
  • Use the appropriate tools to unscrew and remove the valve from its mounting bracket.

Step 3: Test the Purge Control Solenoid Valve

First Test

• Visual Inspection:
  • Check for any signs of damage, cracks, or corrosion on the valve.

Second Test

• Use a Multi-meter:
  • Set your multi-meter to measure resistance.
  • Connect the probes to the terminals of the solenoid.
  • A typical reading should be between 20-60 ohms. If the reading is outside this range, the valve may be faulty.

Step 4: Energize the Purge Control Solenoid Valve

• Bench Test:
  • Connect the solenoid to a 12V power source using alligator wires.
  • Listen for a clicking sound, which indicates the solenoid is functioning. If there is no sound, the valve is likely defective.

Step 5: Test the Wiring

• Check Wiring Connections:
  • Inspect the wiring harness for any frayed wires or loose connections.
• Voltage Test:
  • With the ignition on, use the multi-meter to check for voltage at the connector.
  • A proper reading should be around 12 volts. If there is no voltage, you may have a wiring issue.

Step 6: Replace the Purge Control Solenoid Valve (if necessary)

• Purchase a Replacement:
  • Find a compatible replacement valve based on your vehicle's specifications.
• Installation:
  • Position the new valve in place and secure it with screws.
  • Reconnect the electrical connector.
• Final Checks:
  • Start the vehicle and ensure there are no error codes or abnormal behaviors.

Conclusion

In this tutorial, you learned how to locate, test, and replace a purge control solenoid valve. Regular maintenance of this component can help prevent issues related to engine performance and emissions. If you encounter persistent problems, consider consulting a professional mechanic. Always remember to follow safety precautions when working on vehicles.