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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 › Retrieving Codes › Test Mode No. 1 (Erasing Codes)

Test Mode No. 1 (Erasing Codes)

  1. Codes can be erased only after all DTCs have been displayed and first DTC has been repeated at least once. To erase DTC, turn ignition on. Press test button on Volvo diagnostic unit and hold for more than 5 seconds. Wait for LED response.
  2. 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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