OBDII Code List

P2123 LEXUS - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
Comments  |  Add Comment

P2123 LEXUS Possible Causes

  • Faulty Accelerator Pedal Position (APP) Sensor
  • Accelerator Pedal Position (APP) Sensor harness is open or shorted
  • Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

First diagnose P2123 LEXUS code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P2123 LEXUS code

    Labor: 1.0

    The cost of diagnosing the P2123 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P2123 LEXUS Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P2123 Lexus Description

The Accelerator Pedal Position (APP) sensor is mounted on the accelerator pedal to detect the angle of the accelerator pedal. This sensor is electronically controlled and uses Hall-effect elements.

In the accelerator pedal position sensor, the voltage applied to terminals VPA and VPA2 of the Engine Control Module (ECM) changes between 0 V and 5 V in proportion to the angle of the accelerator pedal. The VPA is a signal to indicate the actual accelerator pedal angle and is used for the engine control. VPA2 is used to detect malfunctions of the sensor itself.

The ECM monitors the accelerator pedal angle from VPA and VPA2 signal outputs, and controls the throttle motor based on these signals.

OBDII Code P2123 Lexus - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High -

P2123 LEXUS More Information

Need more information on how to fix the P2123 LEXUS code?
Get Access to Factory Service Manuals

Need more help?

Get the P2123 Lexus code diagnosed by a professional: Find a repair shop in your area

Related Information

P2123 LEXUS Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P2123 Lexus code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧