AutoCodes – Scion – P0123 2005 Scion xB

P0123 2005 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit High Input

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 2005 Scion xB indicates Throttle Position Sensor/Switch 'A' Circuit High 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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,753

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0123 2005 Scion xB 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 2005 Scion xB - Throttle Position Sensor/Switch 'A' Circuit High Input - AutoCodes.com — P0123 2005 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0123 2005 Scion xB?

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

How to Fix the DTC P0123 2005 Scion xB?

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 2005 Scion xB 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 2005 Scion xB code?

Need more information on how to fix the P0123 2005 Scion xB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0123 2005 Scion xB 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 P0123 2005 Scion xB Code

1. What are the common symptoms of OBDII code P0123 in a 2005 Scion xB?

- Common symptoms include issues with acceleration, high idling speed, poor fuel efficiency, and possible stalling of the vehicle.

2. What are the possible causes of OBDII code P0123 in a 2005 Scion xB?

- The main causes can be a faulty throttle position sensor, damaged wiring or connectors in the throttle position sensor circuit, or a problem with the engine control module.

3. How can I diagnose the throttle position sensor (TPS) in a 2005 Scion xB when experiencing code P0123?

- Use a multimeter to test the TPS for proper voltage output and resistance. Check for any loose or damaged wiring connections as well.

4. Can a dirty throttle body cause code P0123 in a 2005 Scion xB?

- Yes, a dirty throttle body can disrupt the proper functioning of the throttle position sensor and lead to a high input error code like P0123.

5. Is it safe to continue driving a 2005 Scion xB with an OBDII code P0123 related to the throttle position sensor?

- It is not recommended to drive the vehicle with a faulty throttle position sensor as it can lead to unsafe driving conditions and potential damage to the engine.

6. How can I reset the OBDII code P0123 in a 2005 Scion xB after fixing the underlying issue?

- You can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes to clear the error code.

7. Are there any DIY repair tips for fixing OBDII code P0123 in a 2005 Scion xB?

- DIY repair tips include checking and cleaning the throttle body, inspecting the throttle position sensor wiring, and ensuring proper connections.

8. Can a faulty throttle position sensor cause other OBDII codes to appear in a 2005 Scion xB?

- Yes, a faulty throttle position sensor can cause related codes such as P0121 or P0122 to appear due to issues with the sensor's input.

9. What is the typical cost to repair OBDII code P0123 in a 2005 Scion xB at a mechanic or dealership?

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

10. How often does the throttle position sensor need to be replaced in a 2005 Scion xB to prevent code P0123 from recurring?

- The throttle position sensor should be replaced as needed based on symptoms and diagnostic testing, typically every 50,000 to 100,000 miles to ensure proper engine performance.