DTC P0193 CIRCUIT DESCRIPTION The engine control module (ECM) monitors the fuel rail pressure (FRP) via a FRP sensor. When the FRP is high, the signal voltage is high. When the FRP is low, the signal voltage is low. If the fuel rail pressure is above the upper limit for the sensor, DTC P0193 will set.
This is an electronic fault due to either faulty FRP sensor, wiring or ecm, not an actual fuel pressure issue. Since you have replaced both the FRP sensor and wiring harness for it, then unless there is a bent pin at the ecm, the problem is the ecm itself and it will need to be replaced and programmed.
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