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Home >> Buick >> 1996 >> Roadmaster Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Systems - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1415 - Air System Bank 1 >> Test I
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Test I

  1. When AIR pump is enabled, PCM monitors HO2S voltage. If HO2S voltages drop below a threshold, PCM interprets this as an indication that pump is operational.
  2. When AIR pump is disabled, PCM monitors HO2S voltages. HO2S voltages should increase above a threshold and switch normally. If PCM did not sense more than a predetermined amount of HO2S rich switches, a malfunction will be reported.
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