AutoCodes – Toyota – P2123 2011 Toyota Camry

P2123 2011 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

Quick Answer

The Accelerator Pedal Position (APP) sensor is mounted on the accelerator pedal to detect the angle of the accelerator pedal. Common causes include 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. 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 2011 Toyota Camry indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
Common causes: Common causes include 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.
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 2,129

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 10, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2123 2011 Toyota Camry 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 2011 Toyota Camry - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High - AutoCodes.com — P2123 2011 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

What does this mean?

What are the Possible Causes of the DTC P2123 2011 Toyota Camry?

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)

How to Fix the DTC P2123 2011 Toyota Camry?

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 2011 Toyota Camry 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 2011 Toyota Camry 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 2011 Toyota Camry Code

1. What does the OBDII code P2123 mean on a 2011 Toyota Camry?

P2123 indicates a high input voltage issue in the Throttle Pedal Position Sensor/Switch 'D' circuit, which helps monitor and relay throttle pedal position to the engine control module (ECM).

2. What are the common symptoms of code P2123?

Symptoms may include reduced engine power (limp mode), poor throttle response, illuminated check engine light, and difficulty accelerating.

3. What causes the P2123 code to appear?

Common causes include a faulty throttle pedal position sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning ECM.

4. Can I drive my 2011 Toyota Camry with the P2123 code?

Driving with this code is not recommended, as it may cause reduced performance or unsafe driving conditions due to limited throttle response.

5. How do I diagnose the P2123 code?

Diagnosis involves inspecting the throttle pedal position sensor, checking for damaged wiring or connectors, and testing the sensor's voltage and resistance with a multimeter.

6. How can I fix the P2123 code?

Repairs may include replacing the throttle pedal position sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to repair the P2123 code?

Repair costs vary but typically range from $100 to $300, depending on whether the throttle pedal position sensor or wiring needs replacement.

8. Can a dirty throttle body cause the P2123 code?

While a dirty throttle body is not a direct cause, it can contribute to related throttle control issues. Cleaning the throttle body may help as part of broader diagnostics.

9. Will resetting the ECU clear the P2123 code?

Resetting the ECU may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.

10. What tools do I need to fix the P2123 code?

You will need an OBDII scanner, a multimeter for testing the sensor circuit, and basic hand tools to inspect or replace the throttle pedal position sensor.