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Code 34: Mas Airflow Sensor: Notes

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Code 34 is set when engine is running with no MAF sensor signal for greater than 4 seconds.

NOTE: Test numbers refer to test numbers on diagnostic chart.
  1. This tests if ECM recognizes a problem.
  2. A voltage reading at sensor harness terminal "A" of less than 4 volts or greater than 6 volts indicates a fault in circuit No. 492 or poor connections.
  3. Verifies both ignition voltage and a good ground are available.
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