Drive vehicle according to specified driving pattern to set System Readiness Test (SRT) codes. See SYSTEM READINESS TEST under SELF-DIAGNOSTIC SYSTEM.
Select MODE 1 on scan tool and check SRT status of EVAP system. If EVAP system SRT is complete, system is okay at this time. If EVAP system SRT is incomplete, turn ignition off, wait at least 10 seconds and go to next step.

NOTE: It is not necessary to allow engine to cool before driving vehicle.

Perform driving pattern again. Stop vehicle and select MODE 3 on scan tool.
- If DTC P0455 is displayed, go to DIAGNOSTIC PROCEDURE .
- If DTCs P0442 or P1442 is displayed, go to DIAGNOSTIC PROCEDURE under DTC P0442: EVAP CONTROL SYSTEM.
- If DTC P0441 is displayed, go to DIAGNOSTIC PROCEDURE under DTC P0441: EVAP CONTROL SYSTEM.
- If DTCs P0441, DTC P0442, DTC P0455 or DTC P1442 is not displayed, go to next step.
Select MODE 1 on scan tool. If EVAP system SRT is complete, system is okay at this time. If EVAP system SRT is incomplete, go to step 2 .

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

DTC Confirmation Test (Using Generic Scan Tool)