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Top Reasons Your Check Engine Light May Be On

• A problem with the Mass Air Flow (MAF) sensor or circuit.
• System Running Too Lean. An oxygen sensor detected a lean condition (too much oxygen in the exhaust).
• System Running Too Rich: The oxygen sensor detected a rich condition (or a too-high fuel to oxygen ratio).
• Cylinder Misfire: Random or multiple misfires in your engine.
• Knock Sensor Circuit Malfunction.
• Insufficient EGR (Exhaust Gas Recirculation) Flow.
• Catalyst System Efficiency below Threshold.

At AAMCO Transmission Repair Shop of Humble, TX, our technicians understand the reasons why your check engine light might be on, they’ll quickly pin-point what is causing the problem and will recommend only what needs repair. 
Call us today for your FREE engine light check by one of our certified technicians.