P0193
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.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0193 Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
CONDITIONS FOR RUNNING THE DTC
- DTC P0642 or P0643 is not set.
- The ignition is ON.
- The system is not in Power down mode.
CONDITIONS FOR SETTING THE DTC
The ECM detects the signal circuit is more than 175 MPa.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
- The control module limits fuel injection and FRP.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
TEST
