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P2123 2014 Toyota RAV4 Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

Quick Answer

The Accelerator Pedal Position (APP) sensor is built into the accelerator pedal sensor assembly and has 2 sensor circuits: VPA (main) and VPA2 (sub). Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2123 2014 Toyota RAV4 indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
Common causes
Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 265
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 17, 2022
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Code P2123 2014 Toyota RAV4 Description

The Accelerator Pedal Position (APP) sensor is built into the accelerator pedal sensor assembly and has 2 sensor circuits: VPA (main) and VPA2 (sub). This sensor is a non-contact type sensor and uses Hall-effect elements in order to yield accurate signals even in extreme driving conditions, such as at high speeds as well as very low speeds. The voltage, which is applied to terminals VPA and VPA2 of the Engine Control Module (ECM), varies between 0.5 V and 4.75 V in proportion to the operating angle of the accelerator pedal (throttle valve). A signal from VPA indicates the actual accelerator pedal opening angle (throttle valve opening angle) and is used for engine control. A signal from VPA2 conveys the status of the VPA circuit and is used to check the accelerator pedal position sensor itself.
The ECM monitors the actual accelerator pedal opening angle (throttle valve opening angle) through the signals from VPA and VPA2 and controls the throttle actuator according to these signals.
When either the output voltage of VPA or VPA2 deviates from the standard range, or the difference between the output voltages of the 2 sensor circuits is more than the threshold, the ECM determines that there is a malfunction in the accelerator pedal position sensor. The ECM then illuminates the MIL and stores a Diagnostic Trouble Code (DTC).
OBDII Code P2123 2014 Toyota RAV4 - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High - AutoCodes.com
P2123 2014 Toyota RAV4 Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

What are the Possible Causes of the DTC P2123 2014 Toyota RAV4?

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

How to Fix the DTC P2123 2014 Toyota RAV4?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2123 2014 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2123 2014 Toyota RAV4 code?

Need more information on how to fix the P2123 2014 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2123 2014 Toyota RAV4 Code

1. What are the common symptoms of OBDII code P2123 in a 2014 Toyota RAV4?

When this code is triggered, you may experience issues like a lack of acceleration, the vehicle going into limp mode, or the engine stalling.

2. What does the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High mean in relation to OBDII code P2123?

It indicates that the signal from the throttle pedal position sensor/switch 'D' circuit is higher than the normal range accepted by the engine control module.

3. What are possible causes of OBDII code P2123 in a 2014 Toyota RAV4?

The code may be caused by a faulty throttle pedal position sensor, a short or open circuit in the sensor wiring, or a malfunction in the engine control module.

4. How can I diagnose the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High issue in my Toyota RAV4?

You can use a scan tool to read the code, inspect the throttle pedal sensor's wiring for any damage, and test the sensor's voltage output to identify the problem.

5. Can I drive my 2014 Toyota RAV4 with the OBDII code P2123 present?

It is not recommended to drive with this code active as it may lead to unsafe driving conditions or potential further damage to the vehicle.

6. How can I repair OBDII code P2123 in my 2014 Toyota RAV4?

The repair process involves replacing the faulty throttle pedal position sensor, fixing any damaged wiring, or reprogramming the engine control module if necessary.

7. Is it safe to continue driving if the OBDII code P2123 clears itself from the system?

Even if the code clears itself, it's essential to ensure the issue causing the fault code is resolved to prevent future occurrences and potential safety risks.

8. Can a DIY enthusiast fix the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High problem in a 2014 Toyota RAV4?

While some enthusiasts may have the skills to replace the throttle pedal position sensor, proper diagnosis and repair may require professional assistance due to the complexity involved.

9. How much can I expect to pay for repairing OBDII code P2123 in a 2014 Toyota RAV4?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500, including parts and labor.

10. How can I prevent OBDII code P2123 from occurring in my 2014 Toyota RAV4 in the future?

Regular maintenance checks, ensuring proper wiring connections, and addressing any throttle-related issues promptly can help prevent the recurrence of this code.

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