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P0123 Acura Code - Throttle Position Sensor 'A' Circuit High Voltage

Quick Answer

The P0123 diagnostic trouble code (DTC) for Acura vehicles indicates an issue with the Throttle Position Sensor (TPS) 'A' Circuit High Voltage. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in TPS circuit, Malfunctioning ECU. 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 Acura indicates Throttle Position Sensor 'A' Circuit High Voltage.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in TPS circuit, Malfunctioning ECU.
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 12, 2024
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Code P0123 Acura Description

The P0123 diagnostic trouble code (DTC) for Acura vehicles indicates an issue with the Throttle Position Sensor (TPS) 'A' Circuit High Voltage. The TPS is a crucial component of the engine management system, as it monitors the throttle position to help the engine control unit (ECU) determine the appropriate air-fuel mixture for optimal performance. When the TPS 'A' circuit registers a high voltage signal, it suggests that the throttle position sensor is sending a voltage reading that is outside of the expected range. This can lead to a variety of performance issues and potentially cause long-term damage if left unresolved.

OBDII Code P0123 Acura - Throttle Position Sensor 'A' Circuit High Voltage
P0123 Acura Code - Throttle Position Sensor 'A' Circuit High Voltage

Common Causes of P0123 Acura

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in TPS circuit
  3. Malfunctioning ECU
  4. Physical obstructions in throttle body
  5. Corrosion or moisture intrusion in TPS connections

Symptoms of P0123 Acura

  1. Rough idling or stalling
  2. Poor acceleration
  3. Decreased fuel efficiency
  4. Limp mode activation
  5. Check Engine Light illuminated

How to Fix P0123 Acura

  1. Diagnose the issue by using a scan tool to confirm the P0123 code and inspecting the throttle position sensor, wiring, and connectors for any visible damage.
  2. Replace the throttle position sensor if it is determined to be faulty. Make sure to install a new sensor that is compatible with your specific Acura model.
  3. Check and repair any damaged wiring or connectors in the TPS circuit. Ensure that connections are secure and free from corrosion.
  4. Clear the DTC and reset the ECU to see if the P0123 code reappears. Test drive the vehicle to confirm that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to pinpoint the root cause, such as testing the ECU or inspecting the throttle body for obstructions.

Cost to Fix P0123 Acura

The typical repair costs for addressing a P0123 code in an Acura vehicle can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops may charge less. It's advisable to contact local auto repair shops for a more accurate estimate based on your specific circumstances.

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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 Acura Code

1. What are the common symptoms of OBDII code P0123 in an Acura?

- Common symptoms include issues with acceleration, surging or hesitation while driving, poor fuel economy, and in some cases, the Check Engine light may illuminate.

2. What does the OBDII code P0123 for an Acura mean?

- OBDII code P0123 indicates that the Throttle Position Sensor 'A' Circuit is registering a high voltage condition, suggesting a potential problem with the sensor or its wiring.

3. What are the possible causes of OBDII code P0123 in an Acura?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning throttle body, or issues with the engine control module (ECM).

4. How can I diagnose the Throttle Position Sensor 'A' Circuit High Voltage issue in my Acura?

- Diagnosing this issue typically involves using a scan tool to read the OBDII code, testing the throttle position sensor with a multimeter, inspecting the sensor wiring for damage, and checking the throttle body for any obstructions or malfunctions.

5. Can I drive my Acura with the OBDII code P0123 present?

- It is not recommended to drive your Acura with the P0123 code present, as it can lead to poor performance, reduced fuel efficiency, and potential further damage to the engine components.

6. How can I repair the Throttle Position Sensor 'A' Circuit High Voltage issue in my Acura?

- Repairing this issue may involve replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, cleaning or replacing the throttle body, or resetting the ECM to clear the code.

7. Will resetting the ECM clear the OBDII code P0123 in my Acura?

- Resetting the ECM may temporarily clear the code, but if the underlying issue causing the high voltage condition is not addressed, the code is likely to return.

8. How much does it cost to repair OBDII code P0123 in an Acura?

- The cost of repairing OBDII code P0123 can vary depending on the cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

9. Can a DIY enthusiast repair OBDII code P0123 in an Acura?

- Depending on your skill level and access to tools, it may be possible to diagnose and repair the P0123 code yourself by following a repair manual or online guides. However, if you are unsure, it is best to consult a professional mechanic.

10. How often does the Throttle Position Sensor 'A' Circuit High Voltage issue occur in Acura vehicles?

- The occurrence of the P0123 code can vary, but it is a relatively common issue in Acura vehicles, especially in older models or those with high mileage. Regular maintenance and inspections can help prevent such issues.

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