Compare MAF and MAP sensors—what they measure, how they influence fuel metering, and the effects of dirty sensors.

• A. MAF measures actual mass air flow; MAP estimates load by manifold pressure and engine speed. Both feed the ECU for fuel metering; dirty sensors cause incorrect fuel trims, rough idle, misfires, and reduced efficiency.
• B. MAF measures air density, MAP measures air temperature; dirty sensors only affect idle.
• C. Both sensors measure the same parameter; dirt has no effect.
• D. MAF uses MAP to compute mass; MAP uses MAF to compute load; dirty sensors don't affect performance.

Answer: (A)