DTC codes / P24xx · Auxiliary emission controls / P240F
P240F means the powertrain control module (PCM) commanded the exhaust gas recirculation (EGR) system to change flow and the response was slower than the calibrated threshold. The PCM monitors EGR flow or valve position over time and flags this code when the system takes too long to reach the expected change.
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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