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Home >> Volvo >> 1994 >> 850 Base, 4D Sedan, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Turbo >> Self-Diagnostic System >> Clearing Codes

Clearing Codes

  1. Codes can be erased only after all DTCs have been displayed and first DTC has been repeated at least once. See RETRIEVING CODES  .
    2. NOTE: DTCs MUST be erased with the engine off, or procedure may not work.
  2. To erase DTC, turn ignition on, with engine off. Press test button on Volvo diagnostic unit and hold for MORE than 5 seconds. Wait for LED response.
  3. Press button again and hold for more than 5 seconds. Turn ignition off and on. Start engine. All DTCs will be erased and all adaptive values reset.
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