DTC P04D0 EGR Cooler Inlet Temperature Sensor Circuit Low (4JJ3 with DPD)

1. DTC P04D0 description

EGR gas temperature sensor 1 (exhaust manifold side) is installed to the exhaust manifold. EGR gas temperature sensor 1 (exhaust manifold side) is a variable resistor and measures the exhaust gas temperature of the EGR cooler inlet. This sensor has a signal circuit and a low reference circuit. The ECM supplies 5 V to the signal circuit and connects the ground to the low reference circuit. When the exhaust gas temperature is low, the sensor resistance is high, and the higher the exhaust gas temperature becomes, the lower the sensor resistance. The ECM detects a high voltage when the sensor resistance is high, and a low voltage when the sensor resistance is low. If the ECM detects an excessively low signal voltage, the DTC is set.

2. Condition for setting DTC P04D0

Condition for running the DTC

The battery voltage is 9 to 16 V.
The ignition switch is ON.
DTCs P060B and P06D2 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 P06D2 Sensor Reference Voltage 5 Circuit".

Condition for setting the DTC

The ECM detects that the EGR gas temperature sensor 1 (exhaust manifold side) signal voltage is 0.1 V or less for 2 seconds.

3. Action taken when DTC P04D0 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 temperature sensor 1 (exhaust manifold side) value.

4. Condition for clearing DTC P04D0

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".