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Which outcome occurs when an engine's Lambda sensor fails, misreporting lean condition during high RPM operation?

A)Engine knock and potential damage
B)Improved volumetric efficiency occurs
C)Complete combustion and low emissions
D)Reduced cylinder head thermal stress

💡 Explanation

Misreported lean leading to advanced ignition timing causes detonation. Engine knock results from uncontrolled combustion because the engine control unit increases timing attempting to compensate via feedback, therefore knock occurs, rather than safer responses due to aggressive advance.

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