AutoCodes – Toyota – P0122 2006 Toyota Highlander

P0122 2006 Toyota Highlander Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle 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: P0122 2006 Toyota Highlander indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle 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 4,624

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 Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0122 2006 Toyota Highlander Description

The Throttle Pedal Position (TPP) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0122 2006 Toyota Highlander - Throttle Position Sensor/Switch 'A' Circuit Low Input - AutoCodes.com — P0122 2006 Toyota Highlander Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0122 2006 Toyota Highlander?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0122 2006 Toyota Highlander?

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 P0122 2006 Toyota Highlander 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 P0122 2006 Toyota Highlander 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 P0122 2006 Toyota Highlander Code

1. What does the OBDII code P0122 on a 2006 Toyota Highlander indicate?

The code P0122 refers to the Throttle Position Sensor/Switch 'A' Circuit Low Input.

2. What are the common symptoms of a P0122 code in a 2006 Toyota Highlander?

Common symptoms include poor acceleration, lack of power, rough idling, and the vehicle going into "limp mode."

3. What are the possible causes of a P0122 code in a 2006 Toyota Highlander?

Potential causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or issues with the engine control module.

4. How can I diagnose the root cause of a P0122 code in my 2006 Toyota Highlander?

You can use a multimeter to test the throttle position sensor's voltage, check the wiring for any damage or shorts, and scan the vehicle's computer for any related error codes.

5. Can I continue driving my 2006 Toyota Highlander with a P0122 code?

It is not recommended to drive the vehicle with a P0122 code as it can lead to poor performance and potential safety hazards.

6. How can I repair a P0122 code in a 2006 Toyota Highlander?

Repair options may include replacing the throttle position sensor, repairing or replacing damaged wiring, or reprogramming the engine control module.

7. Is it possible to reset a P0122 code in a 2006 Toyota Highlander without fixing the underlying issue?

Resetting the code without addressing the root cause will likely result in the code reappearing once the vehicle is driven again.

8. How much does it typically cost to repair a P0122 code in a 2006 Toyota Highlander?

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

9. Can a DIY enthusiast fix a P0122 code in a 2006 Toyota Highlander?

If you have experience working on vehicles and access to the necessary tools, you may be able to diagnose and repair a P0122 code yourself.

10. How long does it usually take to repair a P0122 code in a 2006 Toyota Highlander?

The repair time can vary based on the specific cause of the issue and your level of experience, but it generally takes a few hours to a full day to complete the repair.