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Engine-Codes – Toyota – P0122 2008 Toyota Camry

P0122 2008 Toyota Camry Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Quick Answer

The P0122 diagnostic trouble code (DTC) for a 2008 Toyota Camry indicates a problem with the Throttle Position Sensor (TPS) or its circuit. Common causes include Faulty Throttle Position Sensor (TPS), Damaged or corroded wiring/connectors in the TPS circuit, Poor electrical connection at the TPS. 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 2008 Toyota Camry indicates Throttle Position Sensor/Switch 'A' Circuit Low Input.
Common causes
Common causes include Faulty Throttle Position Sensor (TPS), Damaged or corroded wiring/connectors in the TPS circuit, Poor electrical connection at the TPS.
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 14, 2024
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Code P0122 2008 Toyota Camry Description

The P0122 diagnostic trouble code (DTC) for a 2008 Toyota Camry indicates a problem with the Throttle Position Sensor (TPS) or its circuit. The TPS is a crucial component of the engine management system that monitors the position of the throttle valve. It provides the Engine Control Module (ECM) with data on the throttle position, allowing the ECM to adjust fuel delivery and ignition timing accordingly. When the TPS 'A' circuit reports a low input signal, it means that the voltage signal from the sensor is lower than expected, indicating a potential issue with the sensor or its wiring.

OBDII Code P0122 2008 Toyota Camry - Throttle Position Sensor/Switch 'A' Circuit Low Input
P0122 2008 Toyota Camry Code - Throttle Position Sensor/Switch 'A' Circuit Low Input

Common Causes of P0122 2008 Toyota Camry

  1. Faulty Throttle Position Sensor (TPS)
  2. Damaged or corroded wiring/connectors in the TPS circuit
  3. Poor electrical connection at the TPS
  4. ECM malfunction or software issue
  5. Environmental factors such as moisture or debris affecting the TPS

Symptoms of P0122 2008 Toyota Camry

  1. Check Engine Light illuminated on the dashboard
  2. Reduced engine power or acceleration
  3. Rough idling or stalling
  4. Hesitation or surging during acceleration
  5. Poor fuel economy

How to Fix P0122 2008 Toyota Camry

  1. Begin by verifying the DTC with a scan tool and confirming the symptoms.
  2. Inspect the TPS wiring, connectors, and harness for any damage or corrosion.
  3. Test the TPS using a multimeter to check for proper voltage signals.
  4. Replace the TPS if it fails the voltage test or shows signs of malfunction.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0122 2008 Toyota Camry

The cost of repairing a Throttle Position Sensor/Switch 'A' Circuit Low Input code on a 2008 Toyota Camry can vary depending on the specific cause of the issue. In general, the cost of a new TPS for a Toyota Camry ranges from $50 to $150, depending on the brand and quality. Labor costs for this repair can range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair. Overall, the total cost of repairing this issue can range from $150 to $450, including parts and labor. It's recommended to consult with a trusted mechanic or repair shop for a more accurate estimate based on your specific situation.

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 2008 Toyota Camry Code

1. What does the OBDII code P0122 for a 2008 Toyota Camry mean?

The code P0122 indicates a Throttle Position Sensor/Switch 'A' Circuit Low Input error in the vehicle's system.

2. What are the common symptoms of a P0122 code in a 2008 Toyota Camry?

Common symptoms include poor engine performance, poor acceleration, stalling, or difficulty starting the vehicle.

3. What are the possible causes of a P0122 code in a 2008 Toyota Camry?

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

4. How can I diagnose a P0122 code in my 2008 Toyota Camry?

Diagnosis involves using an OBDII scanner to read the code, checking the throttle position sensor for proper voltage readings, and inspecting the wiring for any damage.

5. Can I continue driving my 2008 Toyota Camry with a P0122 code?

It is not recommended to drive the vehicle with a P0122 code as it can lead to further damage and unsafe driving conditions.

6. How do I repair a P0122 code in my 2008 Toyota Camry?

Repairing a P0122 code may involve replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming the engine control module.

7. Are there any DIY tips for fixing a P0122 code in a 2008 Toyota Camry?

While some basic troubleshooting like checking connections and wiring can be done at home, it is recommended to seek professional help for accurate diagnosis and repair.

8. How much does it typically cost to fix a P0122 code in a 2008 Toyota Camry?

The cost of fixing a P0122 code 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 P0122 code in a 2008 Toyota Camry affect fuel efficiency?

Yes, a P0122 code can lead to poor fuel efficiency as it affects the proper functioning of the throttle position sensor, which is crucial for engine performance optimization.

10. Is it necessary to reset the OBDII system after fixing a P0122 code in a 2008 Toyota Camry?

Yes, it is recommended to reset the OBDII system after fixing a P0122 code to clear the error code and ensure the issue has been successfully resolved.

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