What is P0123 : Engine Error code Causes Explained
Throttle position sensor input voltage is high in the P0123 engine trouble code. Slow acceleration, harsh idle, and higher fuel usage might result. Discover its causes, symptoms, and solutions to improve engine performance.
How to Identify a DTCs Number
A Diagnostic Trouble Code (DTC) like P0123 is a standardized error code used in vehicles equipped with OBD-II systems.
Understand, this trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
An OBD-II scanner can get the P0123 code from the vehicle’s ECU to validate the issue. The scanner display or diagnostic tool will reveal the precise DTC, helping you find the problem.
Causes of P0123 Code:
- Faulty Throttle Position Sensor (TPS):
This is the most common cause, where the sensor itself is malfunctioning and not sending accurate voltage readings to the ECM. - Damaged TPS wiring harness:
Damaged or corroded wires connecting the TPS to the ECM can disrupt the signal and trigger the code. - Faulty accelerator pedal position sensor:
In some vehicles, the accelerator pedal position sensor can also contribute to this code if it’s malfunctioning. - Improper TPS mounting:
If the TPS is not properly mounted, it might not be reading the throttle position correctly, leading to the code. - ECM issues:
While less common, a faulty ECM could also be the cause, as it might misinterpret the signal from the TPS.
Risk Level of P0123 Error Code:
A high-risk level for this code means that the issue is severe and can lead to major drivability problems. The high-risk level appears because the TPS is a critical component in regulating air and fuel intake.
Immediate inspection and repairs are strongly recommended to prevent further damage and ensure vehicle safety.
Common Car Brands Affected by P0123 Code:
The P0123 engine error code is commonly found in the following list.
- Ford
- BMW
- Honda
- Toyota
Video: P0123 Engine Error code
FAQ’s
What does the engine error code P0123 mean?
The P0123 code indicates a Throttle Position Sensor (TPS) “A” Circuit High Input, meaning the sensor is sending an abnormally high voltage signal to the engine control module (ECM).
What causes the P0123 error code?
Common causes include a faulty throttle position sensor, damaged wiring or connectors, a stuck throttle body, or an ECM issue.
What is the risk level of the P0123 error code?
The risk level is high, as it can lead to poor throttle response, erratic acceleration, high idle, or even engine stalling, affecting drivability and safety.
Which vehicles are affected by the P0123 error code?
This code is commonly found in Ford, BMW, Honda and Toyota with electronic throttle control systems.