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DIAGNOSIS AND TESTING > EVAPORATIVE EMISSIONS > ENGINE DIAGNOSTIC
INFORMATION
For PCM DTC, REFER to: ELECTRONIC ENGINE CONTROLS - 3.7L DURATEC (227KW/301PS) .
For driveability symptoms without DTC, Refer to ENGINE CONTROLS - SYMPTOM CHARTS (EXCEPT DIESEL & HYBRID) .
GENERAL PROCEDURES > EVAPORATIVE EMISSION SYSTEM LEAK TEST
Activation
Phase 1 - Leak Verification
1. Run the EVAP Test with the scan tool.
NOTE: Some small leaks may not be detected using the EVAP Test. If the system has passed the test but a leak is still suspected, then proceed to Phase 2.
2. If the EVAP system failed the EVAP Test, then proceed to Phase 2.
Phase 2 - System Leak Check
3. Disconnect the fuel vapor tube-to-EVAP canister purge valve quick connect coupling. Refer to: QUICK RELEASE COUPLING .
Original technical text and illustrations, formatted as HTML. Follow the engine, transmission, equipment, model and year specified in the source. Import and layout checks do not establish applicability to every 2015–2017 Mustang. About this collection.