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What is the fault of the lean fuel system in the new Alto?

1 Answers

MacHaley

07/30/25 4:43am

Fuel system lean condition occurs when the engine oxygen sensor detects incomplete gasoline combustion, indicating a situation with insufficient fuel and excessive air. Continuing to drive under this condition may result in weak acceleration and increased fuel consumption. Below are the specific causes: Specific causes of fuel lean condition: The reasons leading to a lean fuel system include insufficient gasoline pressure, oxygen sensor malfunction, air flow meter failure, clogged fuel injectors, and intake system leaks. Solutions for fuel lean condition: The occurrence of a fuel lean fault may be due to excessive engine air intake combined with insufficient fuel injection during operation. It is necessary to check for any foreign objects clogging the air filter, determine if fuel quality issues are affecting the oxygen sensor, which in turn reduces engine fuel injection, or if the fuel pump pressure is affected by blockages causing insufficient fuel delivery, leading to a lean fuel system. If the vehicle exhibits a fuel lean fault, immediately visit a 4S shop or repair shop to identify the cause and perform necessary repairs.

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