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.
HG: Positive Crankcase Ventilation (PCV)
HG: Introduction
System
HG1 CHECK FOR DTCS
Are DTCs P0093, P0094, P04DB, P051B, P051C, P051D, P1121, P2279, P2280, P2281 or P2282 present?
Yes | No |
|---|---|
GO to HG4 . | For symptoms without DTCs, GO to HG2 . For all others, RETURN to Section 3 , Symptom Charts for further direction. |
HG2 VISUAL INSPECTION OF THE PCV VALVE
• Remove and inspect the PCV valve for damage.
• Check the PCV valve, hoses and connections for leaks or restrictions.
• Verify the PCV valve maintenance schedule has been followed.
• Verify the correct PCV valve part number.
• Verify the PCV valve is clean.
• Verify the fresh air tube and related hoses are clean and routed correctly.
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. VERIFY the symptom no longer exists. | GO to HG3 . |
HG3 STUCK PCV VALVE CHECK
• Disconnect the PCV valve from the valve cover.
• Shake the PCV valve.
Does the PCV valve rattle when shaken?
Yes | No |
|---|---|
REINSTALL the PCV valve. GO to HG11 . | The PCV valve is sticking. INSTALL a new PCV valve. VERIFY the symptom no longer exists. |
HG4 CHECK FOR VACUUM LEAKS
• Check for a damaged or disconnected PCV vacuum hose.
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.