Electronic Power Control Warning Lamp, Significance

"EPC" is an abbreviation and stands for Electronic Power Control (E-gas).

Engine Control Module (ECM) checks all components that are important for function of the E-Gas system after ignition is switched on.

During the test of these components, the ECM switches the EPC warning lamp on for approximately 1 second. If a malfunction is recognized during the test, the lamp will remain constantly lit.

If malfunctions are recognized in the E-Gas system during operation of the engine, the ECM switches on the EPC warning lamp in instrument cluster. (These malfunctions are listed in the DTC table). An entry is made in DTC memory at the same time.

Special tools and equipment
- VAG 1598/31 adapter cable
- VAG 1526 multimeter or VAG 1715 multimeter
- VAG 1594 connector test kit
- Wiring diagram

Test requirements







- Fuses no. 7 and 29 must be OK.
- Battery voltage must be at least 11.5 volts.