Code Definition

P1295 — Turbocharger bypass valve flow problem

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Audi

About P1295

P1295 is a manufacturer-specific powertrain diagnostic trouble code recorded for Audi vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1295 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1295 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The turbocharger bypass valve, also known as the diverter or recirculation valve, is held shut under boost and opens on throttle lift to route charge air from the compressor outlet back to the compressor inlet, preventing surge. The Engine Control Module monitors the effect of that valve indirectly by comparing specified and actual charge pressure and by watching how boost and mass airflow behave when the valve is commanded. DTC P1295 is stored when the module concludes the bypass valve is not achieving the expected flow, meaning it is leaking when it should be sealed, failing to open when com...

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