AAMCO Greater St. Louis

AAMCO Centers of the St. Louis area


AAMCO Greater St. Louis

AAMCO Centers of the St. Louis area

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 Greater St. Louis centers, 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.