Symptom Chart
| Symptom | Possible Sources | Action |
|---|---|---|
| Loss of power/performance | Clogged Air Cleaner (ACL) element | INSTALL a new Air Cleaner (ACL) element. TEST the system for normal operation. |
| Loose connections or damage to air intake hoses and tubes | TIGHTEN the hose clamps. INSPECT for damage and REPAIR as needed. | |
| Malfunctioning fuel system | Refer to ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) . | |
| Poor fuel quality | DRAIN and FILL with fresh fuel. | |
| Engine wear (piston rings, valve guides) | REPAIR as required. | |
| Turbocharger turbine or compressor wheel damage | INSPECT the turbocharger. REFER to the Check for Free Rotation - Off Vehicle in Component Tests . | |
| Damaged exhaust or exhaust leaks at turbocharger housing | INSPECT for leaks. Leaks can usually be detected audibly or visually, by a discoloration caused by escaping hot exhaust gases. REPAIR as required. | |
| Malfunctioning turbocharger bypass valve | Refer to ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) . | |
| Obstructed wastegate actuator linkage | INSPECT the turbocharger wastegate linkage for obstructions. REPAIR as required. | |
| Damaged wastegate actuator linkage | INSPECT the turbocharger wastegate linkage for damage. INSTALL a new turbocharger as needed. REFER to: Turbocharger LH . REFER to: Turbocharger RH . | |
| Wastegate actuator operation | TEST the wastegate actuator operation. Refer to ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) . | |
| PCM (powertrain control module) - DTC (diagnostic trouble code) | REFER to: ELECTRONIC ENGINE CONTROLS - 2.7L EcoBoost (238kW/324PS). | |
| Symptom | Possible Sources | Action |
|---|---|---|
| Excessive oil consumption | Incorrect type or grade of oil | DRAIN and FILL with specified oil. |
| Oil in exhaust manifolds | REPAIR as required. | |
| Clogged Air Cleaner (ACL) element | INSTALL a new Air Cleaner (ACL) element. TEST the system for normal operation. |
|
| Blocked or restricted turbocharger oil drain tubes | INSPECT the turbocharger oil drain tube. REPAIR as needed. | |
| Damaged or collapsed air intake hoses and tubes | TIGHTEN hose clamps. INSPECT for damage and REPAIR as needed. | |
| Damaged exhaust or exhaust leaks at turbocharger housing to cylinder head | INSPECT for leaks. Leaks can usually be detected audibly or visually, by a discoloration caused by escaping hot exhaust gases. REPAIR as required. | |
| Turbocharger oil seals leaking | REFER to Turbocharger Internal Oil Leak Test in Component Tests . | |
| Damaged crankcase ventilation system | Visually INSPECT the crankcase ventilation system. REPAIR as needed. | |
| Symptom | Possible Sources | Action |
|---|---|---|
| Excessive noise | Turbocharger compressor air intake pipe leaking | REPAIR or INSTALL a new pipe as required. |
| Loose connections or damage to air intake hoses and tubes | TIGHTEN hose clamps. INSPECT for damage and REPAIR as needed. | |
| Air leaks at turbine housing, blown joints or damaged exhaust | INSPECT for leaks. Leaks can usually be detected audibly or visually, by a discoloration caused by escaping hot exhaust gases. REPAIR as required. | |
| Carbon build up in the turbine housing causing contact with turbine wheel | INSPECT the turbocharger. REFER to the Check for Free Rotation - Off Vehicle in Component Tests . | |
| Turbocharger imbalance due to foreign object/damage | REPAIR as required. | |
| Turbine bearing failure | INSPECT the turbocharger. REFER to the Check for Free Rotation - Off Vehicle in Component Tests . | |
| Inoperative turbocharger bypass valve | Refer to ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) . | |
| Symptom | Possible Sources | Action |
|---|---|---|
| Engine emits excessive smoke (black/blue/white) | Clogged Air Cleaner (ACL) element | INSTALL a new Air Cleaner (ACL) element. TEST the system for normal operation. |
| Incorrect type or grade of oil | DRAIN and FILL with specified oil. | |
| Blocked or restricted turbocharger oil drain tubes | INSPECT the turbocharger oil drain tube. REPAIR as needed. | |
| Damaged/restricted or leaking turbocharger compressor air intake pipe | REPAIR or INSTALL a new pipe as required. | |
| Engine wear (piston rings, valve guides) | REPAIR as required. | |
| Plugged crankcase ventilation system | Visually INSPECT the crankcase ventilation system. REPAIR as needed. | |
| Turbocharger oil seals leaking | REFER to Turbocharger Internal Oil Leak Test in Component Tests . | |
| Symptom | Possible Sources | Action |
|---|---|---|
| Turbocharger oil leaks | Turbocharger oil tube seals and/or oil tube leaking | Visually INSPECT the turbocharger oil tubes and the turbocharger oil tube seals/gaskets. REPLACE the turbocharger oil tube seals/gaskets and the turbocharger oil tubes as needed. Refer to: Turbocharger Oil Return Tube LH . REFER to: Turbocharger Oil Return Tube RH . REFER to: Turbocharger Oil Supply Tube LH . REFER to: Turbocharger Oil Supply Tube RH . |
| Symptom | Possible Sources | Action |
|---|---|---|
| Turbocharger coolant leaks | Turbocharger coolant tube seals and/or coolant tube leaking | Visually INSPECT the turbocharger coolant tubes and the turbocharger coolant tube seals/gaskets. REPLACE the turbocharger coolant tube seals/gaskets and the turbocharger coolant tubes as needed. REFER to: Turbocharger Coolant Return Tube LH . REFER to: Turbocharger Coolant Return Tube RH . REFER to: Turbocharger Coolant Supply Tube LH . REFER to: Turbocharger Coolant Supply Tube RH . |