P0193

DTC P0193

CIRCUIT DESCRIPTION
The engine control module (ECM) monitors the fuel rail pressure via a fuel rail pressure (FRP) sensor. When the fuel rail pressure is high the signal voltage is high. When the fuel rail pressure is low the signal voltage is low. If the fuel rail pressure is above the upper limit for the sensor, DTC P0193 will set.

CONDITIONS FOR RUNNING THE DTC
- DTC P0641 or P0651 are not set.
- The ignition is ON.
- The system is not in Powerdown 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 fuel rail pressure.

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

Steps 1-3:

Steps 4-6:

Steps 7-11:

Steps 12-16: