Code Definition

P1572 — Cruise control brake switch circuit fault

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

About P1572

P1572 is a manufacturer-specific powertrain diagnostic trouble code recorded for Infiniti vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1572 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

P1572 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

This code relates to the cruise control brake switch circuit, part of the automatic speed control system known on these Nissan and Infiniti vehicles as ASCD. For safety the system watches the brake using two signals, the ASCD brake switch, which is normally closed and opens when the pedal is pressed, and the stop lamp switch, which is normally open and closes when the pedal is pressed. The Engine Control Module or cruise control unit compares these and DTC P1572 is set when the two do not agree or the brake switch signal is implausible, for example showing the brake applied continuously. With ...

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