DTC P0471 EGR Gas Pressure Sensor Performance (4JJ3 with DPD)

1. DTC P0471 description

The EGR gas pressure sensor is installed to the exhaust manifold via the adapter. The EGR gas pressure sensor changes the signal voltage in accordance with the pressure changes of the exhaust gas sent from the EGR cooler inlet via the EGR gas pipe. The barometric pressure sensor is installed within the ECM. The barometric pressure sensor changes the signal voltage in accordance with changes in the barometric pressure. Diagnosis is performed in the ECM by comparing the EGR gas pressure sensor signal with the barometric pressure sensor signal. If the ECM detects that both signals are not within the specified range, the DTC is set.

2. Condition for setting DTC P0471

Condition for running the DTC

The battery voltage is 9 to 16 V.
The ignition switch is ON, or within 11 seconds after the ignition switch was turned OFF.
The engine is stopped
DTCs P0472, P0473, P0606, P060B, P06A3, P2228, and P2229 are not set.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0472 EGR Gas Pressure Sensor Circuit Low".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0473 EGR Gas Pressure Sensor Circuit High".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0606 ECM/PCM Processor".

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".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2228 Barometric Pressure Circuit Low".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P2229 Barometric Pressure Circuit High".

Condition for setting the DTC

The ECM detects that the difference between the exhaust gas pressure and the barometric pressure is 36 kPa {5 psi} or more for 10 seconds.

3. Action taken when DTC P0471 sets

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

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

The ECM inhibits the EGR control.

4. Condition for clearing DTC P0471

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".