DTC codes / P24xx · Auxiliary emission controls / P2435
P2435 indicates that the powertrain control module has detected an implausible signal from the secondary air injection system's air flow or pressure sensor on bank 2, meaning the sensor's voltage or rationality check has failed. The computer expects a specific pressure or flow reading when the air pump runs, and the reported value falls outside that expected range during the system's self-test.
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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