AutoCodes – Toyota – P0123 2006 Toyota Corolla

P0123 2006 Toyota Corolla Code - Throttle Position Sensor/Switch 'A' Circuit High Input 3ZZ-FE Engine

Quick Answer

The Throttle Position Sensor (TPS) 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
P0123 2006 Toyota Corolla indicates Throttle Position Sensor/Switch 'A' Circuit High Input 3ZZ-FE Engine.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 4,292
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0123 2006 Toyota Corolla Description

The Throttle Position Sensor (TPS) 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 P0123 2006 Toyota Corolla - Throttle Position Sensor/Switch 'A' Circuit High Input 3ZZ-FE Engine - AutoCodes.com
P0123 2006 Toyota Corolla Code - Throttle Position Sensor/Switch 'A' Circuit High Input 3ZZ-FE Engine

What are the Possible Causes of the DTC P0123 2006 Toyota Corolla?

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

How to Fix the DTC P0123 2006 Toyota Corolla?

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 P0123 2006 Toyota Corolla 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 P0123 2006 Toyota Corolla code?

Need more information on how to fix the P0123 2006 Toyota Corolla 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 P0123 2006 Toyota Corolla Code

1. What are the common symptoms of OBDII code P0123 in a 2006 Toyota Corolla?

The common symptoms of OBDII code P0123 in a 2006 Toyota Corolla include issues with acceleration, rough idling, stalling, and potential decrease in fuel efficiency.

2. What does the OBDII code P0123 indicate in a 2006 Toyota Corolla?

OBDII code P0123 in a 2006 Toyota Corolla indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit High Input for the 3ZZ-FE engine.

3. What are the possible causes of OBDII code P0123 in a 2006 Toyota Corolla?

Possible causes of OBDII code P0123 in a 2006 Toyota Corolla include a faulty throttle position sensor, wiring issues, a corroded connector, or a problem with the engine control module.

4. How can I diagnose the cause of OBDII code P0123 in my 2006 Toyota Corolla?

To diagnose the cause of OBDII code P0123 in a 2006 Toyota Corolla, you can use a scan tool to check for the code, visually inspect the throttle position sensor and its wiring, and perform voltage tests on the sensor.

5. How can I repair OBDII code P0123 in a 2006 Toyota Corolla?

To repair OBDII code P0123 in a 2006 Toyota Corolla, you may need to replace the throttle position sensor, repair any damaged wiring, clean the connector, or reset the engine control module.

6. Can I drive my 2006 Toyota Corolla with OBDII code P0123?

It is not recommended to drive your 2006 Toyota Corolla with OBDII code P0123, as it can lead to poor engine performance, potential stalling, and other safety concerns.

7. How much does it cost to fix OBDII code P0123 in a 2006 Toyota Corolla?

The cost to fix OBDII code P0123 in a 2006 Toyota Corolla can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Is OBDII code P0123 a common issue in 2006 Toyota Corollas with a 3ZZ-FE engine?

Yes, OBDII code P0123 related to the Throttle Position Sensor/Switch 'A' Circuit High Input is a relatively common issue in 2006 Toyota Corollas with the 3ZZ-FE engine.

9. Can a DIY enthusiast fix OBDII code P0123 in a 2006 Toyota Corolla?

Depending on their skill level, a DIY enthusiast may be able to fix OBDII code P0123 in a 2006 Toyota Corolla by following repair guides, using basic tools, and conducting thorough research.

10. Will OBDII code P0123 cause permanent damage to my 2006 Toyota Corolla if left untreated?

If left untreated, OBDII code P0123 in a 2006 Toyota Corolla can potentially cause further damage to the engine or affect overall vehicle performance, so it is best to address the issue promptly.

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