Error Code P2123 is defined as Throttle/Pedal Position Sensor/Switch D Circuit High Input, an issue usually caused by wiring short positive, APP/TPP/ sensor or switch problems.
This error code is a generic trouble code, meaning it applies to all cars equipped with OBD-II system, especially those made since 1996 up to present. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another. However, it only applies to cars with an electronic throttle body.
Error Code P2123 indicates that the PCM (powertrain control module, also known as ECM or engine control module, which in charge of receiving signals from the throttle position (TP) sensor) has determined a malfunction in one of the circuits of the TP sensor.
As with other error codes, this code activates the Check Engine light and registers the code to your 2012 Mitsubishi Eclipse spyder’s memory. Other obvious symptoms include:
Since this code only applies to cars equipped with an electronic throttle body, possible causes would be:
To diagnose this code, mechanics start by locating the throttle body of your 2012 Mitsubishi Eclipse spyder to check its connectors and wirings that lead to the throttle body motor and throttle position (TP) sensor.
If all the connectors and wirings look good, the mechanic will proceed to test the TP sensor and the throttle body motor for the proper function using the recommended procedure set by your 2012 Mitsubishi Eclipse spyder’s manufacturer.
In the unlikely event that problem could not be found after the test, the mechanic would then proceed to test the PCM to make sure it is working properly.
Whichever part is found to be defective would be replaced at your 2012 Mitsubishi Eclipse spyder owner’s request.
Repairs for this code are pretty simple and straightforward, which of course can only be determined through thorough diagnosis. Some of the common repairs are:
Error Code P2123 is a serious problem as it can cause driveability conditions, such as poor acceleration or even no start condition. In worst cases, the code can cause stalling, leaving the driver stranded on the road. Thus, it is important to have this code thoroughly diagnosed and repaired as soon as possible.