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ok, so I have a 2011 F-550 XL truck, I had a problem with an open injector4 and was forced to replace the engine, later, I had a problem while installing an OLEP kit, misplaced the hose and killed the engine (...i know... ) so, I changed 3/4 of the engine, just mechanical parts and reused the wires and cables, now the check engine light is ON with an oil pressure error, replaced the sensor and the error remains, replaced the computer and guess what ...again, the same error.
Does anyone have an idea of what might be going on?...I'm going crazy