DTC P0442, DTC P0455 &/Or DTC P0456: Notes

Code Definition

DTC P0442: EVAP Emission Control System Small Leak Detected (1 mm)
DTC P0455: EVAP Emission Control System Large Leak Detected
DTC P0456: EVAP Emission Control System Small Leak Detected (0.5 mm)

NOTE: DTC P0455 may be set and Malfunction Indicator Light (MIL) illuminates, when refuelling vehicle with engine running or fuel filler cap is open/loose when engine is running.

NOTE: Before performing any diagnostic test, refer toWARNINGS, CAUTIONS and NOTES in DIAGNOSTIC TESTS .

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohmmeter Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.