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Audi TSB #01146120352352
2014 Audi S8
TSB Document:
Affected Component: FUEL SYSTEM, GASOLINE
- Summary
- The fuel metering valve of the high-pressure fuel pump is controlled by a specific on/off ratio. If there is a low system voltage, the on/off ratio may not be enough to keep the fuel metering valve constant in all areas. In such a situation, the fuel metering valve is deactivated and the high-pressure fuel pump switches to full supply mode. Because the increased rail pressure does not match the respective driving situation, the DTC appears.
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