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Engine-Codes – Scion – P0123 2007 Scion xB

P0123 2007 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit High Input

Quick Answer

The P0123 code in a 2007 Scion xB indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a high input signal. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the TPS circuit. 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 2007 Scion xB indicates Throttle Position Sensor/Switch 'A' Circuit High Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections in the TPS circuit.
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 17, 2024
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Code P0123 2007 Scion xB Description

The P0123 code in a 2007 Scion xB indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a high input signal. The throttle position sensor (TPS) is a crucial component of the vehicle's fuel management system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the optimal air-fuel mixture for combustion. When the TPS 'A' circuit reports a high input signal, it means that the voltage signal sent by the sensor is higher than the expected range.

OBDII Code P0123 2007 Scion xB - Throttle Position Sensor/Switch 'A' Circuit High Input
P0123 2007 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit High Input

Common Causes of P0123 2007 Scion xB

  1. Faulty throttle position sensor.
  2. Damaged wiring or connectors in the TPS circuit.
  3. Corrosion or poor connections in the TPS circuit.
  4. Issues with the engine control module (ECM).
  5. Environmental factors such as moisture or debris affecting the TPS.

Symptoms of P0123 2007 Scion xB

  1. Check Engine Light illuminated on the dashboard.
  2. Poor fuel efficiency.
  3. Rough idling or stalling.
  4. Hesitation or lack of response during acceleration.
  5. Engine misfires.

How to Fix P0123 2007 Scion xB

  1. Begin by diagnosing the issue using a diagnostic scanner to retrieve the trouble code and identify the specific problem with the TPS 'A' circuit.
  2. Inspect the throttle position sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Test the TPS using a multimeter to ensure it is functioning within the specified voltage range.
  4. Clear the trouble code from the ECM's memory using the diagnostic scanner and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0123 2007 Scion xB

The typical repair costs for addressing a P0123 code in a 2007 Scion xB can vary depending on the specific cause of the issue and the labor rates in your area. In general, replacing a faulty throttle position sensor can cost between $100 and $200, while addressing wiring or connector issues may range from $50 to $150. Labor costs at auto repair shops typically range from $80 to $150 per hour. It's advisable to consult with a trusted mechanic or dealership to get a more accurate estimate based on your vehicle's specific needs and location.

When is the Code Detected?

An excessively high voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

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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 2007 Scion xB Code

1. What are common symptoms of OBDII code P0123 in a 2007 Scion xB?

- Common symptoms include issues with acceleration, poor fuel economy, and potential stalling or rough idling.

2. What does the OBDII code P0123 'Throttle Position Sensor/Switch 'A' Circuit High Input' mean for a 2007 Scion xB?

- This code indicates that the throttle position sensor is sending a higher than expected voltage signal to the engine control module.

3. What are some possible causes of OBDII code P0123 in a 2007 Scion xB?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, a stuck throttle, or issues with the engine control module.

4. How can I diagnose the cause of OBDII code P0123 in my 2007 Scion xB?

- Diagnosing the issue may involve visually inspecting wiring and connectors, testing the throttle position sensor, and using a scan tool to monitor sensor readings.

5. Can I drive my 2007 Scion xB with OBDII code P0123?

- It is not recommended to drive the vehicle with this code present, as it can lead to poor performance, reduced fuel efficiency, and potential safety hazards.

6. How can I repair OBDII code P0123 in a 2007 Scion xB?

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

7. Is it safe to reset the OBDII code P0123 in a 2007 Scion xB without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the root cause, as the issue may persist and potentially lead to further damage.

8. How much does it typically cost to repair OBDII code P0123 in a 2007 Scion xB?

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

9. Can a DIY enthusiast fix OBDII code P0123 in a 2007 Scion xB?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code themselves, but professional assistance is often recommended.

10. How frequently does OBDII code P0123 occur in 2007 Scion xB vehicles?

- The occurrence of this code can vary, but it is not uncommon in vehicles with higher mileage or those that have not had regular maintenance on the throttle system.

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