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Home >> Volvo >> 1993 >> 850 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Clearing Codes
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Clearing Codes

  1. Turn ignition on. Press test button for more than 5 seconds. Release button. LED should light after 3 seconds. Press button again for more than 5 seconds. Release button. LED should go out.
  2. To ensure codes have been cleared, press button for more than one second (but no more than 3 seconds). If Code 1-1-1 is displayed, codes have been cleared. If codes have not been cleared, repeat procedure.
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