Poor fuel mileage
Precautions: General safety (00)
Perform troubleshooting referring to the following points when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M16A and Engine Basic Inspection:M16A.
| Condition | Possible Cause | Action |
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Poor fuel mileage
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Faulty spark plug (improper gap, heavy deposits and burned electrodes, etc.)
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High idle speed
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Condition “Improper engine idling or engine fails to idle”
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Poor performance of ECT sensor or MAP sensor
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Faulty electric throttle body assembly
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Faulty APP sensor
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Faulty fuel injector
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Faulty ECM
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Low compression
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Poor valve seating
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Dragging brakes
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Condition “Dragging brakes” in Brake Symptom Diagnosis
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Slipping clutch (M/T model)
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Condition “Slipping” in Clutch System Symptom Diagnosis:5 M/T
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Thermostat out of order
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Improper tire pressure
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VVT system out of order
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•VVT actuator: VVT Actuator, Camshaft, Tappet and Shim Inspection:M16A
•Valve timing: Timing Chain and Chain Tensioner Inspection:M16A •OCV oil circuit: Timing Chain Cover Inspection:M16A |