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The P1122 code refers to a specific diagnostic trouble code (DTC) related to the performance of the vehicle's fuel system, particularly indicating that the fuel pressure is lower than expected. It can result from various issues, such as a failing fuel pump, clogged fuel filter, or problems with fuel injectors. When this code is triggered, it often leads to decreased engine performance and efficiency, and it’s essential to diagnose and address the underlying cause to restore proper functionality.

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