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 without DPD) DTC P060B Internal Control Module A/D Processing Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without 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
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".
- The ECM limits the fuel injection quantity.
- The ECM inhibits pre-injection.
- The ECM inhibits the EGR control.
- The ECM limits the fuel rail pressure.
- The ECM inhibits the cruise control.
- The ECM assumes a default fuel rail pressure value.
4. Condition for clearing DTC P0193
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".