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P0123 Mazda Code - Throttle Position Sensor 1 Circuit High Input

Quick Answer

The P0123 code for Mazda vehicles indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit, specifically a high input signal being detected by the Engine Control Module (ECM). Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Malfunctioning Engine Control Module (ECM). 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 Mazda indicates Throttle Position Sensor 1 Circuit High Input.
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Malfunctioning Engine Control Module (ECM).
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 06, 2024
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Code P0123 Mazda Description

The P0123 code for Mazda vehicles indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit, specifically a high input signal being detected by the Engine Control Module (ECM). The TPS is a crucial component that monitors the position of the throttle valve, providing feedback to the ECM to adjust fuel delivery and ignition timing accordingly. When the ECM receives a high voltage signal from the TPS, it may lead to incorrect fuel and air mixture, affecting the engine's performance and overall drivability.

OBDII Code P0123 Mazda - Throttle Position Sensor 1 Circuit High Input
P0123 Mazda Code - Throttle Position Sensor 1 Circuit High Input

Common Causes of P0123 Mazda

  1. Faulty Throttle Position Sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Malfunctioning Engine Control Module (ECM)
  4. Mechanical issue with the throttle body

Symptoms of P0123 Mazda

  1. Rough idling
  2. Poor acceleration
  3. Stalling
  4. Hesitation during acceleration
  5. Check Engine Light illuminated

How to Fix P0123 Mazda

  1. Begin by connecting a diagnostic scanner to retrieve the specific trouble code and confirm the issue.
  2. Inspect the Throttle Position Sensor, wiring, and connectors for any signs of damage or corrosion.
  3. Test the TPS using a multimeter to ensure it is functioning correctly within the specified voltage range.
  4. If the TPS is faulty, replace it with a new one and recalibrate as necessary.
  5. Clear the trouble code from the ECM and test drive the vehicle to confirm the issue has been resolved.

Cost to Fix P0123 Mazda

The typical repair cost for addressing a Throttle Position Sensor Circuit High Input issue in a Mazda vehicle can range from $150 to $300, including parts and labor. However, it is important to note that actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop. Additionally, diagnosis time and labor rates can influence the overall cost, with rates typically ranging from $80 to $150 per hour. It is recommended to obtain quotes from reputable auto repair shops to get a more accurate estimate for this repair.

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 Mazda Code

1. What are the common symptoms of OBDII code P0123 in a Mazda related to the Throttle Position Sensor 1 Circuit High Input?

- Common symptoms include issues with acceleration, rough idling, stalling, and poor fuel efficiency.

2. What are the potential causes of OBDII code P0123 in a Mazda indicating a Throttle Position Sensor 1 Circuit High Input?

- The code may be triggered by a faulty throttle position sensor, a short or open circuit in the sensor's wiring, or a problem with the vehicle's ECM.

3. How can I diagnose OBDII code P0123 in my Mazda that points to Throttle Position Sensor 1 Circuit High Input?

- A thorough diagnosis involves checking the throttle position sensor's voltage output, inspecting the sensor's wiring for any damage, and scanning the ECM for related error codes.

4. Can I continue driving my Mazda with OBDII code P0123 indicating a Throttle Position Sensor 1 Circuit High Input?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety hazards.

5. Are there any quick repair tips for fixing OBDII code P0123 in a Mazda related to the Throttle Position Sensor 1 Circuit High Input?

- Quick repair tips include checking and cleaning the throttle position sensor connector, ensuring proper wiring connections, and resetting the ECM after making any repairs.

6. How much does it typically cost to repair OBDII code P0123 in a Mazda caused by Throttle Position Sensor 1 Circuit High Input?

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

7. Can a DIY enthusiast fix OBDII code P0123 in a Mazda related to Throttle Position Sensor 1 Circuit High Input?

- While some DIY enthusiasts may be able to diagnose and repair this issue, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair.

8. How long does it take to repair OBDII code P0123 in a Mazda indicating Throttle Position Sensor 1 Circuit High Input?

- The repair time can vary based on the exact cause of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.

9. Will resetting the OBDII system clear the P0123 code in a Mazda indicating Throttle Position Sensor 1 Circuit High Input?

- Resetting the OBDII system may temporarily clear the code, but it will likely reappear if the underlying issue with the throttle position sensor is not addressed.

10. Is it important to address OBDII code P0123 in a Mazda related to Throttle Position Sensor 1 Circuit High Input promptly?

- Yes, it is crucial to address this code promptly to prevent further damage to the vehicle and ensure optimal performance and fuel efficiency.

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