DTC codes / P24xx · Auxiliary emission controls / P2441
P2441 indicates that the secondary air injection (AIR) system switching valve on bank 1 is stuck closed, preventing air from being routed into the exhaust stream during cold starts. The powertrain control module (PCM) detects this by monitoring the AIR system pressure or oxygen sensor response and recognizing that the expected change did not occur when the valve was commanded open.
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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