DTC P0122 Throttle Position Sensor Circuit Low (4JJ3 with DPD)

1. DTC P0122 description

The intake throttle position sensor is installed to the intake throttle valve body together with the motor. The intake throttle position sensor changes the signal voltage in accordance with the intake throttle valve opening position. The sensor has the following circuits.

5 V reference circuit
Low reference circuit
Intake throttle position sensor signal circuit

The intake throttle position sensor sends signals related to intake throttle valve position changes to the ECM via the signal circuit. If the ECM detects an excessively low signal voltage, the DTC is set.

2. Condition for setting DTC P0122

Condition for running the DTC

The battery voltage is 9 to 16 V.
The ignition switch is ON.
DTCs P060B and P0697 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 P0697 Sensor Reference Voltage 3 Circuit".

Condition for setting the DTC

The ECM detects that the intake throttle position sensor signal voltage is 0.3 V or less.

3. Action taken when DTC P0122 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.

4. Condition for clearing DTC P0122

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".