DTC P0472 EGR Gas Pressure Sensor Circuit Low (4JJ3 with DPD)

1. DTC P0472 description

The EGR gas pressure sensor is installed to the exhaust manifold via the adapter. It detects the pressure of the exhaust gas sent from the EGR cooler inlet through the EGR gas pipe and converts the pressure into a voltage signal to send it to the ECM. The sensor has the following circuits.

  • 5 V reference circuit
  • Ground circuit
  • EGR gas pressure sensor signal circuit

The ECM monitors the EGR gas pressure sensor signal voltage. The signal voltage increases as the pressure at the EGR valve inlet rises, and it decreases as the pressure declines. If the ECM detects an excessively low signal voltage, the DTC is set.

2. Condition for setting DTC P0472

Condition for running the DTC

  • The battery voltage is 9 to 16 V.
  • The ignition switch is ON.
  • DTCs P060B and P06A3 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 P06A3 Sensor Reference Voltage 4 Circuit".

Condition for setting the DTC

  • The ECM detects that the EGR gas pressure sensor signal voltage is 0.3 V or less for 3 seconds.

3. Action taken when DTC P0472 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 inhibits the EGR control.
  • The ECM assumes a default EGR gas pressure sensor value.

4. Condition for clearing DTC P0472

  • 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".

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