The control module judged the Brake Booster Pressure signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
556
Specific fault index within the subsystem.
Frequently asked questions about P0556
What does P0556 mean?
Brake Booster Pressure Sensor Circuit Range/Performance. The control module judged the Brake Booster Pressure signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Is P0556 generic or manufacturer-specific?
P0556 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0556 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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