P0456

(P0456) EVAP SYSTEM: SMALL LEAK





When Monitored and Set Condition
^ When Monitored: Engine Running. Cold start test. Fuel Level greater than 12%. Ambient Temperature between 4°C and 32°C (39°F and 89°F), Close Loop fuel system.
^ Set Condition: The PCM activates the Evap Purge Solenoid to pull the Evap system into a vacuum. The PCM turns the Evap Purge solenoid off to seal the Evap system. If the Fuel Tank Pressure Sensor reads between -1.5 to +1.0 hPa (-0.0218 to 0.0145 psi) before the calibrated amount of time for a Medium leak/Small leak, an error is detected. Two Trip Fault.

POSSIBLE CAUSES
- EVAPORATIVE EMISSION SYSTEM LEAK
- FUEL TANK PRESSURE SENSOR



Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on. With the DRBIII, read PCM DTCs.
Is this DTC present?
Yes >> For complete diagnosis of this DTC, refer to (P0455) EVAP SYSTEM: LARGE LEAK. P0455
No >> Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Note: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

Note: Check for any Technical Service Bulletins that may apply.

Were there any problems found?
Yes >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST - VER 2 Powertrain Verification Test - Ver 2.
No >> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.