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Engine-Codes – Scion – P0122 2007 Scion xB

P0122 2007 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The P0122 code on a 2007 Scion xB indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a low input signal. Common causes include Faulty throttle position sensor, Wiring issues or poor electrical connections, Corrosion or dirt buildup on sensor contacts. 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 2007 Scion xB indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Wiring issues or poor electrical connections, Corrosion or dirt buildup on sensor contacts.
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 P0122 2007 Scion xB Description

The P0122 code on a 2007 Scion xB indicates a problem with the Throttle Position Sensor/Switch 'A' Circuit, specifically a low input signal. The throttle position sensor (TPS) is a crucial component that 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 appropriate air-fuel mixture for optimal engine performance.

OBDII Code P0122 2007 Scion xB - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 2007 Scion xB Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 2007 Scion xB

  1. Faulty throttle position sensor
  2. Wiring issues or poor electrical connections
  3. Corrosion or dirt buildup on sensor contacts
  4. ECM software or hardware problems
  5. Mechanical issues affecting the throttle body

Symptoms of P0122 2007 Scion xB

  1. Rough idling or stalling
  2. Hesitation or lack of response when accelerating
  3. Decreased fuel efficiency
  4. Check Engine Light illuminated
  5. Reduced power output

How to Fix P0122 2007 Scion xB

  1. Begin by diagnosing the TPS using a scan tool to confirm the P0122 code and check for any related codes.
  2. Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the TPS using a multimeter to verify its functionality. Replace the sensor if it fails to provide the correct voltage signal.
  4. Clear the fault codes and reset the ECM to see if the issue persists. Test drive the vehicle to ensure the problem is resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the throttle body or ECM.

Cost to Fix P0122 2007 Scion xB

The cost of repairing a P0122 code on a 2007 Scion xB can vary depending on the specific cause of the issue. In general, replacing a faulty throttle position sensor can cost between $50 and $200, including parts and labor. If additional repairs or diagnostics are needed, the total cost could increase. It's important to factor in diagnostic time and labor rates, which typically range from $80 to $150 per hour at most auto repair shops. Rates may vary based on location, vehicle make and model, and the complexity of the repair. For a more accurate estimate, it's recommended to consult with a qualified mechanic or repair shop.

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 2007 Scion xB Code

1. What are the common symptoms of OBDII code P0122 on a 2007 Scion xB?

- Common symptoms include poor acceleration, rough idling, stalling, reduced fuel efficiency, and the vehicle going into "limp mode."

2. What causes the Throttle Position Sensor/Switch 'A' Circuit Low Input code (P0122) on a 2007 Scion xB?

- The most common causes of P0122 are a faulty throttle position sensor, damaged wiring or connectors, a dirty throttle body, or issues with the engine control module.

3. How can I diagnose the Throttle Position Sensor/Switch 'A' Circuit Low Input code on my 2007 Scion xB?

- Diagnosing P0122 involves using an OBDII scanner to retrieve the code, checking the throttle position sensor's voltage output, inspecting the wiring for any damage, and testing the throttle body.

4. Can I drive my 2007 Scion xB with OBDII code P0122?

- It is not recommended to drive with P0122 as it can lead to further damage to the engine or other components. It's best to address the issue promptly.

5. Can I repair OBDII code P0122 on my 2007 Scion xB myself?

- Depending on your mechanical skills, you may be able to address P0122 yourself by replacing the throttle position sensor, checking the wiring connections, and cleaning the throttle body. If unsure, consult a professional mechanic.

6. Will resetting the OBDII code P0122 on my 2007 Scion xB make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P0122 is not fixed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code P0122 on a 2007 Scion xB?

- The cost of repairing P0122 can vary depending on the cause of the issue. Replacing a throttle position sensor can range from $100 to $300, while addressing wiring or other issues may increase the cost.

8. What are the long-term effects of ignoring OBDII code P0122 on a 2007 Scion xB?

- Ignoring P0122 can lead to poor engine performance, decreased fuel efficiency, potential damage to other engine components, and safety concerns due to erratic acceleration or stalling.

9. Is OBDII code P0122 a common issue in 2007 Scion xB vehicles?

- Yes, P0122 is a relatively common issue in 2007 Scion xB models, particularly as the vehicle ages and the throttle position sensor wears out.

10. How frequently should I check the throttle position sensor on my 2007 Scion xB to prevent OBDII code P0122?

- It is recommended to check the throttle position sensor during routine maintenance or whenever you notice any symptoms of poor acceleration or idling to prevent the occurrence of P0122.

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