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ELECTRICAL
FUEL INJECTION SYSTEM
Error Code P0174
System or Component PE system Lean
Detail of Error Lean fuel ratio
Engine Symptomes
• Poor drivability
• Deteriorated exhaust
• Unstable engine idling (Different idling engine rpm)
• Overheat
• Engine knock sound
Engine Running availability Able to run engine
DIAG Tool Code —
How to Diagnosis —
Probable Cause
• Fuel system malfunction (Clogged fuel filter/line, fuel injector, fuel
pump)
• Malfunction in O
2
sensor
• Malfunction in manifold absolute pressure sensor
• Difference of actual intake air volume (Intake air leak/clogged man-
ifold)
• Running out fuel
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