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Home >> Volkswagen >> 2001 >> Jetta GL, 2.0 B >> Repair and Diagnosis >> External Pages >> Different car >> Section 77 (2.8L - Engine Mechanical, Engine Code: BDF) >> 26 - Exhaust System, Emission Controls >> Exhaust system components, servicing >> Significance of Malfunction Indicator Lamp (MIL) for exhaust emissions

Significance of Malfunction Indicator Lamp (MIL) for exhaust emissions

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If the engine control module detects a malfunction it switches on the Malfunction Indicator Lamp (MIL).

Fig 1: Locating MIL For Exhaust Emissions
GW00000939Courtesy of VOLKSWAGEN UNITED STATES, INC.

Location MIL

NOTE:
  • The MIL can switch on in the continuous or flashing mode. Check the DTC memory in every case: → 01 ON BOARD DIAGNOSTIC (OBD)
  • Flashing mode: There is a malfunction present which can damage the catalytic converter when continuing to drive at this power output. If this occurs, continue driving only at reduced output.
  • Continuous mode: There is a malfunction present which causes the emissions to deteriorate. Check the Motronic engine control module and/or transmission control module.
  • Check the DTC memory if the customer has a complaint or if there is a driving characteristic problem and the MIL does not light up. This is because malfunctions can be stored which will not switch on the MIL immediately.
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