Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Oldsmobile >> 1990 >> Cutlass Calais Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.3L PFI >> Diagnostic Tests >> Code 34: Mas Airflow Sensor >> Notes

Code 34: Mas Airflow Sensor: Notes

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.
scientia non olet · About Mike's Workshop Manuals