DTC P0193 Fuel Rail Pressure Sensor Circuit High (4JJ3 with DPD)

1. DTC P0193 description

The FRP sensor is installed on the fuel rail and detects the fuel pressure inside the fuel rail, converts the pressure to a voltage signal, and sends it to the ECM. The sensor has the following circuits.

5 V reference circuit
Low reference circuit
FRP sensor signal circuit

The ECM monitors the FRP sensor signal voltage. The signal voltage increases as the fuel rail pressure rises, while it decreases as the pressure declines. The ECM calculates the actual fuel rail pressure from the voltage signal and uses the result in the fuel injection control and other control tasks. If the ECM detects an excessively high signal voltage, the DTC is set.

2. Condition for setting DTC P0193

Condition for running the DTC

The battery voltage is 9 to 16 V.
The ignition switch is ON.
DTCs P060B and P0651 are not set.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P060B Internal Control Module A/D Processing Performance".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0651 Sensor Reference Voltage 2 Circuit".

Condition for setting the DTC

The ECM detects that the FRP sensor signal voltage is 4.75 V or more.

3. Action taken when DTC P0193 sets

The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".

The ECM limits the fuel injection quantity.
The ECM inhibits pre-injection.
The ECM inhibits the EGR control.
The ECM inhibits the cruise control.
The ECM assumes a default FRP sensor value.

4. Condition for clearing DTC P0193

Refer to Conditions for clearing the MIL/DTC - Type A or Type B.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".