DTC Troubleshooting: P0456(3.0L Engine): Notes

DTC P0456  : Evaporative Emission (EVAP) System Very Small Leak Detected

Special Tools Required 

Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000B or equivalent, commercially available 

How to use this manual .

NOTICE: 

• Before you troubleshoot, review the How to Troubleshoot - Refer to: How to Troubleshoot the Fuel and Emissions Systems(2.0L Engine) or How to Troubleshoot the Fuel and Emissions Systems(3.0L Engine) .
• The fuel system is designed to allow specified maximum vacuum and pressure conditions. Do not deviate from the vacuum and pressure tests as indicated in these procedures. Excessive pressure/vacuum would damage the EVAP components or cause eventual fuel tank failure.