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Engine-Codes – Scion – P0122 2005 Scion xB

P0122 2005 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The diagnostic code P0122 for a 2005 Scion xB indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a low input signal being detected. Common causes include Worn or damaged Throttle Position Sensor, Loose or corroded electrical connections to the TPS, Faulty wiring 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
P0122 2005 Scion xB indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Worn or damaged Throttle Position Sensor, Loose or corroded electrical connections to the TPS, Faulty wiring 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 08, 2024
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Code P0122 2005 Scion xB Description

The diagnostic code P0122 for a 2005 Scion xB indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a low input signal being detected. The Throttle Position Sensor (TPS) is a crucial component of the vehicle's electronic fuel injection system. It is responsible for monitoring the position of the throttle valve and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate air-fuel mixture for combustion in the engine.

OBDII Code P0122 2005 Scion xB - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 2005 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 2005 Scion xB

  1. Worn or damaged Throttle Position Sensor
  2. Loose or corroded electrical connections to the TPS
  3. Faulty wiring in the TPS circuit
  4. Issues with the ECM
  5. Environmental factors like moisture or dirt affecting the TPS

Symptoms of P0122 2005 Scion xB

  1. Rough idling or stalling
  2. Poor acceleration or hesitation when pressing the gas pedal
  3. Decreased fuel efficiency
  4. Check Engine Light illuminated on the dashboard

How to Fix P0122 2005 Scion xB

  1. Begin by diagnosing the issue using a diagnostic scanner to confirm the P0122 code and identify the specific problem with the TPS.
  2. Inspect the Throttle Position Sensor and its wiring for any visible signs of damage, wear, or corrosion. Replace the sensor if necessary.
  3. Check the electrical connections to the TPS and ensure they are secure and free of corrosion. Clean or repair any damaged connections.
  4. Test the TPS using a multimeter to verify that it is sending the correct voltage signals to the ECM. Adjust or replace the sensor if needed.
  5. Clear the diagnostic trouble codes from the ECM and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P0122 2005 Scion xB

The typical repair costs for a Throttle Position Sensor/Switch 'A' Circuit Low Input issue can vary depending on the extent of the problem and the cost of parts and labor in your area. In general, replacing a TPS sensor can range from $50 to $200, while additional costs for diagnostic testing and labor may bring the total repair bill to around $150 to $400. Keep in mind that these are rough estimates, and actual costs may vary based on the specific circumstances of your vehicle and location. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

When is the Code Detected?

An excessively low 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 P0122 2005 Scion xB Code

1. What are the common symptoms of OBDII code P0122 in a 2005 Scion xB?

The common symptoms of code P0122 in a 2005 Scion xB include reduced engine power, poor acceleration, stalling, and the check engine light illuminating.

2. What does the OBDII code P0122 mean for a 2005 Scion xB?

Code P0122 indicates a low input signal from the throttle position sensor or throttle position switch 'A' circuit in the 2005 Scion xB, suggesting a potential issue with the sensor's operation.

3. What are the possible causes of OBDII code P0122 in a 2005 Scion xB?

The possible causes of code P0122 in a 2005 Scion xB include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning throttle body, or issues with the ECM.

4. How can I diagnose the throttle position sensor in a 2005 Scion xB with code P0122?

To diagnose the throttle position sensor in a 2005 Scion xB with code P0122, you can use a multimeter to test the sensor's voltage output, inspect the sensor's wiring and connectors for damage, and perform a visual inspection of the throttle body.

5. What are some repair tips for resolving OBDII code P0122 in a 2005 Scion xB?

Some repair tips for resolving code P0122 in a 2005 Scion xB include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, cleaning the throttle body, and resetting the ECM after repairs are completed.

6. Can I continue driving my 2005 Scion xB with OBDII code P0122?

It is not recommended to continue driving your 2005 Scion xB with code P0122, as the issue could lead to further engine problems or safety concerns. It is advisable to address the problem promptly.

7. How much does it cost to repair OBDII code P0122 in a 2005 Scion xB?

The cost to repair code P0122 in a 2005 Scion xB can vary depending on the exact cause of the issue. Replacing the throttle position sensor or repairing damaged wiring may cost a few hundred dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P0122 in a 2005 Scion xB?

A DIY enthusiast with some automotive repair experience may be able to fix code P0122 in a 2005 Scion xB by following repair guides, using basic tools, and ensuring proper diagnosis of the issue before attempting repairs.

9. Will resetting the check engine light resolve OBDII code P0122 in a 2005 Scion xB?

Simply resetting the check engine light will not resolve code P0122 in a 2005 Scion xB. It is essential to diagnose the underlying issue causing the code and perform the necessary repairs to clear the code properly.

10. How long does it take to repair OBDII code P0122 in a 2005 Scion xB?

The time needed to repair code P0122 in a 2005 Scion xB can vary based on the specific cause of the issue and the expertise of the technician. In general, repairs for this code can take anywhere from 1 to 3 hours to complete.

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