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TuningBot DTC Database · v4.37.15

P1555 VAG - Diagnostic Trouble Code (2 interpretations)

Manufacturer-specific interpretation for VAG. All interpretations of P1555

P · PowertrainEngineOBD2

What P1555 means

P1555
Turbocharger (TC) pressure - upper limit exceeded VAG · engine Data confidence 62%

The control module detected that the monitored Turbocharger (TC) pressure - upper limit value exceeded the calibrated threshold. This is the manufacturer-specific definition used by Audi.

Possible causes

  • Hoses interchanged/not connected
  • TC wastegate regulating valve
  • turbocharger (TC) wastegate actuator
  • TC
Applies to Audi
P1555
Boost Pressure Control: Upper Limit Exceeded VAG · engine Data confidence 88%

The control module detected that the monitored Boost Pressure Control: Upper Limit value exceeded the calibrated threshold. This is the manufacturer-specific definition used by Volkswagen. Volkswagen Group tools also report it as fault code 17963. Documented across Volkswagen Group applications (Audi, SEAT and Škoda included).

Symptoms

  • Reduced power output
  • Limp mode

Possible causes

  • Boost Pressure too High
  • Hoses/Pipes incorrect connected, disconnected, blocked or leaking
  • Charger Pressure Control defective
  • Solenoid Valve for Boost Pressure Control (N75) defective

Recommended checks

  • Check Hoses/Pipes to/between Components
  • Check Solenoid Valve for Boost Pressure Control (N75)
  • Check / Clean / Replace Charge Pressure Control
Applies to Volkswagen

Related and nearby codes

How to read P1555

P

Powertrain: engine, transmission and driveline systems.

1

Manufacturer-defined range: the meaning can differ between brands.

555

Specific fault index within the subsystem.

Frequently asked questions about P1555

What does P1555 mean?

Diagnostic Trouble Code (2 interpretations). The control module detected that the monitored Turbocharger (TC) pressure - upper limit value exceeded the calibrated threshold. This is the manufacturer-specific definition used by Audi.

Is P1555 generic or manufacturer-specific?

P1555 is a manufacturer-specific code. In this database it is documented for: VAG. The same number can mean something different on other brands.

Can TuningBot remove P1555 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningStage 1 dyno results for VAG engines See the results →

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