i06157556
Fuel Consumption Is
Excessive
Probable Causes
• Diagnostic codes
• Misreading of fuel level
• Fuel leakage
• Fuel quality
• Quality of oil
• Coolant temperature
• Prolonged operation at idle speed
• Air intake and exhaust system
• Cooling fan
• Reduced pressure of intake air
• Excessive valve lash
• Failure of the primary speed/timing sensor
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
186 UENR4469-36
Symptom Troubleshooting
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