Circuit Description

Evaporative Emission (EVAP) system is checked by applying vacuum to EVAP system and monitoring vacuum decay. Powertrain Control Module (PCM) monitors vacuum level by means of fuel tank vacuum sensor input. At a predetermined time, EVAP purge solenoid and EVAP vent solenoid are turned on. This allows engine vacuum to draw a small vacuum on entire EVAP system.

Conditions for setting this DTC are as follows:

• Intake air temperature is more than 32°F (0°C).
• No presence of Codes: P0106-P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0131-P0134, P1133.
• Fuel tank level is 15-85 percent.
• A continuous purge flow condition is detected during diagnostic test.