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There times when a faulty sensor will not throw a code.

Symptoms of a Faulty Mass Air Flow Sensor
  • The engine is very hard to start or turn over.
  • The engine stalls shortly after starting.
  • The engine hesitates or drags while under load or idle.
  • Hesitation and jerking during acceleration.
  • The engine hiccups.
  • Excessively rich or lean idling.
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