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P2123 2010 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

Quick Answer

The P2123 code for a 2010 Toyota Camry indicates a problem with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High. Common causes include Faulty throttle pedal position sensor, Wiring issues in the circuit, ECM malfunction. 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 2010 Toyota Camry indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input High.
Common causes
Common causes include Faulty throttle pedal position sensor, Wiring issues in the circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P2123 2010 Toyota Camry Description

The P2123 code for a 2010 Toyota Camry indicates a problem with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input High. This means that the sensor or switch responsible for monitoring the position of the throttle pedal is sending a signal that is higher than the expected range to the Engine Control Module (ECM). The throttle pedal position sensor is crucial for the proper functioning of the vehicle's electronic throttle control system. When this sensor malfunctions and sends incorrect signals to the ECM, it can lead to issues with the engine's performance and overall drivability of the vehicle.

OBDII Code P2123 2010 Toyota Camry - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High
P2123 2010 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input High

Common Causes of P2123 2010 Toyota Camry

  1. Faulty throttle pedal position sensor
  2. Wiring issues in the circuit
  3. ECM malfunction
  4. Corrosion or damage to electrical connections
  5. Environmental factors such as moisture or heat affecting sensor performance

Symptoms of P2123 2010 Toyota Camry

  1. Reduced engine power
  2. Poor acceleration
  3. Rough idling
  4. Stalling
  5. Decreased fuel efficiency

How to Fix P2123 2010 Toyota Camry

  1. Diagnose the issue by using a diagnostic scanner to retrieve the trouble code and determine the specific cause of the problem.
  2. Inspect the throttle pedal position sensor, wiring, and electrical connections for any signs of damage or corrosion.
  3. Replace the faulty throttle pedal position sensor or repair any damaged wiring or connections.
  4. Clear the trouble code from the ECM and perform a test drive to ensure that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other components of the throttle control system.

Cost to Fix P2123 2010 Toyota Camry

The typical repair costs for addressing a P2123 code on a 2010 Toyota Camry can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the actual cost can vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Additionally, the diagnosis time and labor rates at auto repair shops can also impact the final cost of the repair. It's recommended to consult with a trusted mechanic or repair shop to get an accurate estimate for addressing this issue.

What does this mean?

Tech Notes for P2123 2010 Toyota Camry

2007-2010 Toyota Camry apply for the recall for a bad Accelerator Pedal Position (APP) Sensor. You can call Toyota and check to see if your vehicle applies for the recall.

Need more information about the P2123 2010 Toyota Camry code?

Need more information on how to fix the P2123 2010 Toyota Camry code? Get Access to Factory Service Manuals

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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 2010 Toyota Camry Code

1. What does the OBDII code P2123 mean on a 2010 Toyota Camry?

P2123 indicates a problem with the Throttle Pedal Position Sensor/Switch 'D' Circuit, specifically that the input signal is higher than expected.

2. What are the common symptoms of the P2123 code in a 2010 Toyota Camry?

Symptoms include reduced engine performance, the throttle not responding properly, a lit check engine light, and in some cases, the vehicle may enter "limp mode."

3. What causes the P2123 code to appear?

Possible causes include a faulty throttle pedal position sensor, damaged wiring or connectors, a malfunctioning throttle body, or issues with the Engine Control Module (ECM).

4. Can I drive my 2010 Toyota Camry with a P2123 code?

It is not recommended to drive the vehicle extensively with this code, as it could result in unsafe driving conditions due to reduced throttle response or limp mode activation.

5. How do I fix the P2123 code on my 2010 Toyota Camry?

Repairs may involve replacing the throttle pedal position sensor, repairing or replacing damaged wiring, cleaning or replacing the throttle body, or reprogramming the ECM if necessary.

6. How can I diagnose the P2123 code in my Toyota Camry?

Start by using an OBDII scanner to confirm the code. Then inspect the throttle pedal position sensor, wiring, and connectors for damage or loose connections. Test the sensor with a multimeter if needed.

7. How much does it cost to repair a P2123 code on a 2010 Toyota Camry?

Repair costs can vary; replacing the throttle pedal position sensor typically ranges from $100 to $300, while wiring repairs may cost less. ECM repairs or replacements are more expensive, often exceeding $500.

8. Can cleaning the throttle body fix the P2123 code?

In some cases, cleaning a dirty throttle body may resolve the issue if carbon buildup is causing signal interference, but this is not always the root cause.

9. Is the P2123 code covered under warranty for a 2010 Toyota Camry?

It depends on your specific warranty terms and mileage. Check with your Toyota dealership to confirm coverage for throttle-related components.

10. What tools are needed to troubleshoot the P2123 code?

You’ll need an OBDII scanner, a multimeter to test electrical components, and possibly basic hand tools to access and inspect the throttle pedal position sensor and wiring.

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