Engine-Codes.com
Engine-Codes – Toyota – P2122 2007 Toyota Highlander

P2122 2007 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low

Quick Answer

The P2122 code for a 2007 Toyota Highlander indicates a problem with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input being low. Common causes include Faulty throttle pedal position sensor, Wiring or connector issues in the circuit, Corrosion or damage to sensor components. 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
P2122 2007 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low.
Common causes
Common causes include Faulty throttle pedal position sensor, Wiring or connector issues in the circuit, Corrosion or damage to sensor components.
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 05, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P2122 2007 Toyota Highlander Description

The P2122 code for a 2007 Toyota Highlander indicates a problem with the Throttle Pedal Position Sensor/Switch 'D' Circuit Input being low. This sensor is crucial for the engine management system to determine the correct throttle position and adjust fuel delivery and airflow accordingly. When this sensor malfunctions and sends a low input signal, it can lead to issues with engine performance, fuel efficiency, and overall drivability of the vehicle. If not addressed, it can potentially cause further damage to the engine or other related components.

OBDII Code P2122 2007 Toyota Highlander - Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low
P2122 2007 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low

Common Causes of P2122 2007 Toyota Highlander

  1. Faulty throttle pedal position sensor
  2. Wiring or connector issues in the circuit
  3. Corrosion or damage to sensor components
  4. Electronic control module (ECM) malfunction
  5. Environmental factors like moisture or debris affecting sensor operation

Symptoms of P2122 2007 Toyota Highlander

  1. Reduced engine power or acceleration
  2. Engine stalling or hesitation
  3. Check Engine Light illuminated on the dashboard
  4. Rough idling or uneven engine operation
  5. Difficulty maintaining a constant speed

How to Fix P2122 2007 Toyota Highlander

  1. Begin by conducting a thorough inspection of the throttle pedal position sensor and its wiring harness for any visible damage or wear.
  2. Test the sensor's voltage output using a multimeter to determine if it is within the manufacturer's specifications.
  3. Replace the throttle pedal position sensor if it is found to be faulty or not functioning correctly.
  4. Clear the diagnostic trouble codes from the vehicle's ECM using a scan tool.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the sensor is now providing accurate readings to the engine management system.

Cost to Fix P2122 2007 Toyota Highlander

The cost of repairing a P2122 code on a 2007 Toyota Highlander can vary depending on the specific cause of the issue and the parts required. In general, the replacement of a throttle pedal position sensor can range from $100 to $200, including parts and labor. Additional costs may apply if other components need to be replaced or if further diagnostics are necessary. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle. Labor rates can vary, so it's advisable to inquire about these costs upfront.

Need more information about the P2122 2007 Toyota Highlander code?

Need more information on how to fix the P2122 2007 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2122 2007 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area

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 P2122 2007 Toyota Highlander Code

1. What are the common symptoms of OBDII code P2122 in a 2007 Toyota Highlander?

The common symptoms of code P2122 include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.

2. What does the Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low mean?

This code indicates that the voltage signal from the throttle pedal position sensor or switch 'D' is lower than expected by the Engine Control Module (ECM).

3. What are the possible causes of OBDII code P2122 in a 2007 Toyota Highlander?

The possible causes of code P2122 include a faulty throttle pedal position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the ECM.

4. How can I diagnose the cause of OBDII code P2122 in my 2007 Toyota Highlander?

Diagnosing code P2122 involves checking the throttle pedal position sensor for proper operation, inspecting the sensor wiring and connectors for damage, and testing the ECM for any faults.

5. Can I continue driving my 2007 Toyota Highlander with OBDII code P2122?

It is not recommended to drive your vehicle with code P2122 as it can lead to unsafe driving conditions and potential damage to the engine components.

6. How can I repair OBDII code P2122 in my 2007 Toyota Highlander?

To repair code P2122, you may need to replace the throttle pedal position sensor, repair any damaged wiring or connectors, or reprogram the ECM if necessary.

7. Will resetting the OBDII code P2122 in my 2007 Toyota Highlander make it go away permanently?

Resetting the code may temporarily clear the check engine light, but if the underlying issue causing code P2122 is not addressed, the code is likely to reappear.

8. How much does it typically cost to repair OBDII code P2122 in a 2007 Toyota Highlander?

The cost of repairing code P2122 can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix OBDII code P2122 in a 2007 Toyota Highlander?

If you have experience with automotive repairs and the necessary tools, you may be able to diagnose and repair code P2122 yourself. However, it is recommended to consult a professional if you are unsure.

10. Is OBDII code P2122 a common issue in 2007 Toyota Highlanders?

While code P2122 may not be a common issue in 2007 Toyota Highlanders, it can still occur due to various factors such as sensor wear, wiring issues, or ECM malfunctions.

Discuss the causes and fixes for P2122 2007 Toyota Highlander OBDII Code

Submit a New Comment

Code P2122 2007 Toyota Highlander comments

No comments found for this page.