1. DTC P2123 description
The accelerator pedal position sensor is installed to the accelerator pedal. The sensor consists of 2 sensors in 1 housing. The ECM uses the accelerator pedal position sensor to calculate the desired acceleration and deceleration. Accelerator pedal position sensor 1 has the following circuits.
- 5 V reference circuit
- Low reference circuit
- Accelerator pedal position sensor 1 signal circuit
Accelerator pedal position sensor 1 sends signals related to accelerator pedal angle changes to the ECM via the signal circuit. If the ECM detects an excessively high signal voltage, the DTC is set.
2. Condition for setting DTC P2123
Condition for running the DTC
- The battery voltage is 9 to 16 V.
- The ignition voltage is 9 to 16 V.
- The ignition switch is ON.
- DTC P060B is not set.
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P060B (Flash Code 36) Internal Control Module A/D Processing Performance".
Condition for setting the DTC
- The ECM detects that the accelerator pedal position sensor 1 signal voltage is 4.8 V or more.
3. Action taken when DTC P2123 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(RZ4E-TC) DTC type definitions".
- The ECM inhibits the cruise control.
4. Condition for clearing DTC P2123
- 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(RZ4E-TC) DTC type definitions".