What is the fault code P0 123 of Honda Odyssey 03?

Fault code: P0 123, throttle/accelerator pedal position sensor/switch A circuit high.

This fault code indicates that the signal voltage of electronic accelerator pedal position sensor A is higher than the calibrated maximum value (4.65v). The fault causes include the short circuit of the sensor signal circuit to the positive electrode, the fault of the sensor itself or the fault of the electronic control module (PCM or ECM).

In the Electronic Throttle Control (ETC) system, the function of the accelerator pedal position (APP) sensor is to transmit the position of the accelerator pedal to the throttle control module in the form of an electrical signal, which serves as a reference for the throttle actuator to control the throttle opening.

When a car breaks down, it is often necessary to clear the fault code. When clearing the fault code, it must be carried out in strict accordance with the fault code clearing method specified by the specific vehicle model, and the negative lead of the battery shall not be directly removed in order to clear the fault code.

Extended data:

When clearing the fault code, it needs to be cleared according to the method of clearing the fault code specified by the corresponding model. Otherwise, it is likely to cause the following two problems:

First, the control computers of some models have lost "experience memory", and the central computers of most models have memory function. After the battery negative grounding wire is removed, the useful data of engine operation stored in the random access memory will be cleared.

Secondly, sometimes it leads to some useful functions, such as audio lock.

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