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DTC codes / P24xx · Auxiliary emission controls / P2433
P2433 means the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit of the secondary air injection (SAI) system's air flow or pressure sensor on bank 1. The sensor is responsible for reporting how much air the SAI pump is delivering, and a high voltage typically indicates an open circuit, a short to voltage, or a sensor that is reading outside its expected range.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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