Audi A4 B8 2.0TDI 120HP CAGC - Fuel Pressure Sensor Signal Too Low // Signal

Damian98Audi 67710 30

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#31 19746417 05 Dec 2021 18:10

Audimandan Audimandan

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Post #31
19746417 05 Dec 2021 18:10

Hi, I have the same engine and just purchased a genuine Bosch part. To fit is it literally a case of unplugging the sensor, removing the two bolts and bolting the new part in? Can't seem to find much info on exactly what's involved.
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Topic summary

The discussion revolves around an Audi A4 B8 2.0TDI 120HP (CAGC) experiencing unstable idle revolutions (700-900 RPM) and a fuel pressure sensor error. The user diagnosed the issue by unplugging the fuel pressure sensor, which temporarily stabilized the engine but triggered a new error indicating a high signal from the sensor. Various responses suggest checking the pressure regulator, high-pressure pump, and ensuring the use of original parts. Users discuss the need for adaptation resets after replacing components, with some indicating that a damaged valve may be the root cause of the problem. The conversation highlights the importance of monitoring fuel pressure and the potential impact of faulty sensors and regulators on engine performance.
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