Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
◾ EGR valve gasket leak to intake manifold ◾ EGR valve diaphragm or control solenoid
• Verify the integrity of the positive crankcase ventilation (PCV) system.
• Verify the correct PCV valve part number, (if equipped).
• Inspect the exhaust system for leaks at flanges and gaskets.
• Visually inspect the HO2S for:
◾ pinched, shorted, and corroded wiring and pins ◾ oil or water contamination ◾ crossed sensor wires
• Inspect for an incorrectly seated engine oil dipstick, dipstick tube, or oil fill cap.
Is a concern present?
Yes | No |
|---|---|
For vacuum leak concerns, GO to H9 . For all others, REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | GO to H4 . |
H4 CARRY OUT THE RELATIVE INJECTOR FLOW TEST
Note: The IDS test referenced in this step may not be available on all vehicles. Follow the YES answer if the IDS test is not available.
• Ignition OFF.
• Carry out the Relative Injector Flow Test. Refer to the instruction manual provided by the scan tool manufacturer.
Does the test pass?
Yes | No |
|---|---|
For DTCs P2270, P2271, P2272 or P2273, GO to H25 . For Explorer 3.5L GTDI with DTCs P219C, P219D, P219E, P219F, P21A0 or P21A1, GO to H7 . For all others with DTCs P219C, P219D, P219E, P219F, P21A0 or P21A1, GO to H6 . For all others, GO to H5 . | INSTALL a new Fuel Injector. REFER to the Workshop Manual Section 303-04, Fuel Charging and Controls. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. |
H5 CHECK THE EVAP SYSTEM FOR A STUCK OPEN EVAP PURGE VALVE
• Ignition ON, engine running.
• Access the PCM and monitor the FTP (PRESS) PID.
• Access the PCM and control the EVAPCP (PER) PID.
• Close the EVAP purge valve by commanding the EVAPCP PID to 0%.
• Access the PCM and control the EVAPCV (MODE) PID.
• Close the EVAP canister vent valve by commanding the EVAPCV PID to ON (100% duty cycle).
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.