P0557

Brake Booster Pressure Sensor Circuit Low

P0557 is a generic OBD-II powertrain diagnostic trouble code: Brake Booster Pressure Sensor Circuit Low. It is logged by the engine control unit when the turbo/boost monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P0557
Group
Powertrain
System
Turbo/Boost
Severity
Warning (MIL on)
Need P0557 disabled?
RaceTune permanently disables any OBD-II trouble code on supported ECUs — for motorsport, off-road, and export use.
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Detailed reference content for P0557 is being prepared. What you see above — the code's group, system, and the software disable option below — is accurate and complete; the long-form explainer, common causes, symptoms, and diagnostic steps will appear here once they have been reviewed.

Related powertrain codes

Disabling P0557 in software

RaceTune can permanently disable P0557 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECU families we can disable P0557 on

We hold the DaVinci A2L disable definitions for these families, so the exact P0557 path and mask addresses are mapped. verified marks a confirmed disable definition. We support many more — upload your file and our identifier will match it automatically.

  • Bosch EDC17CP44 verified
  • Bosch MD1CP004 verified

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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Upload your ECU file — we'll identify the exact software version and confirm whether a disable is available for your car.

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