P0123 Honda Code - Throttle Position Sensor 'A' Circuit High Voltage
Quick Answer
The P0123 diagnostic trouble code (DTC) for Honda vehicles indicates an issue with the Throttle Position Sensor (TPS) circuit having a high voltage output. Common causes include Faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Corrosion or poor connection 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
- P0123 Honda indicates Throttle Position Sensor 'A' Circuit High Voltage.
- Common causes
- Common causes include Faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Corrosion or poor connection 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0123 Honda Description
The P0123 diagnostic trouble code (DTC) for Honda vehicles indicates an issue with the Throttle Position Sensor (TPS) circuit having a high voltage output. The TPS is a crucial component in the engine management system, as it helps the engine control unit (ECU) determine the throttle position and adjust fuel delivery and ignition timing accordingly. When the ECU receives a high voltage signal from the TPS circuit, it may lead to incorrect fuel and air mixture, affecting the engine's performance and efficiency.
Common Causes of P0123 Honda
- Faulty Throttle Position Sensor (TPS)
- Damaged wiring or connectors in the TPS circuit
- Corrosion or poor connection in the TPS circuit
- Issues with the ECU or its communication with the TPS
Symptoms of P0123 Honda
- Decreased fuel efficiency
- Rough idling or stalling
- Hesitation or surging during acceleration
- Poor throttle response
- Check Engine Light illuminated on the dashboard
How to Fix P0123 Honda
- Begin by connecting a diagnostic scanner to the vehicle's onboard computer to retrieve the specific trouble code(s) and confirm P0123.
- Inspect the TPS sensor, wiring, and connectors for any visible damage or corrosion. Replace any components that show signs of wear or malfunction.
- Test the TPS sensor using a multimeter to ensure it is sending the correct voltage signals to the ECU. Adjust or replace the sensor if necessary.
- Clear the DTC from the ECU memory using the diagnostic scanner and test drive the vehicle to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be required to identify any underlying issues with the ECU or other related components.
Cost to Fix P0123 Honda
The typical repair costs for addressing a P0123 code in a Honda vehicle may range from $100 to $300, depending on the extent of the issue and the specific parts that need to be replaced. This estimate includes the cost of a new TPS sensor, wiring repairs, and labor. It is worth noting that prices can vary based on the location, vehicle make and model, and the rates of the auto repair shop. It is recommended to inquire about specific diagnosis time and labor rates before proceeding with the repair.
Need more information about the P0123 Honda code?
Need more information on how to fix the P0123 Honda code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0123 Honda code diagnosed by a professional: Find a repair shop in your area
Information for Specific Honda Models
- P0123 1996 Honda Civic — Throttle Position Sensor/Switch 'A' Circuit High Voltage
- P0123 1997 Honda Civic — Throttle Position Sensor/Switch 'A' Circuit High Voltage
- P0123 1998 Honda Civic — Throttle Position Sensor/Switch 'A' Circuit High Voltage
- P0123 1999 Honda Civic — Throttle Position Sensor/Switch 'A' Circuit High Voltage
- P0123 2000 Honda Civic — Throttle Position Sensor/Switch 'A' Circuit High Voltage
- P0123 2016 Honda CR-V — Throttle Position Sensor 'A' Circuit High Voltage
- P0123 2017 Honda CR-V — Throttle Position Sensor 'A' Circuit High Voltage
- P0123 2018 Honda CR-V — Throttle Position Sensor 'A' Circuit High Voltage
- P0123 2019 Honda CR-V — Throttle Position Sensor 'A' Circuit High Voltage
- P0123 2020 Honda CR-V — Throttle Position Sensor 'A' Circuit High Voltage
- P0123 2021 Honda CR-V — Throttle Position Sensor 'A' Circuit High Voltage
Frequently Asked Questions about P0123 Honda Code
1. What are the common symptoms of OBDII code P0123 in a Honda related to the throttle position sensor?
- Common symptoms include poor acceleration, stalling, rough idling, and potential issues with the transmission shifting.
2. What are the potential causes of OBDII code P0123 in a Honda?
- The code P0123 is typically triggered by a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module (ECM).
3. How can I diagnose the throttle position sensor 'A' circuit high voltage issue in my Honda?
- Diagnosing this issue involves using a scan tool to read the OBDII code, checking the sensor's voltage output, inspecting wiring for damage, and testing the sensor's functionality.
4. Can I drive my Honda with the throttle position sensor 'A' circuit high voltage issue?
- It is not recommended to drive your Honda with this issue as it can lead to poor performance, potential safety hazards, and further damage to the vehicle.
5. What are some repair tips for fixing the throttle position sensor 'A' circuit high voltage problem in a Honda?
- Repair tips include replacing the faulty throttle position sensor, repairing damaged wiring or connectors, and resetting the ECM after the issue has been resolved.
6. Will resetting the ECM clear the OBDII code P0123 in my Honda?
- Resetting the ECM may temporarily clear the code, but it is important to diagnose and fix the underlying issue causing the P0123 code to prevent it from reoccurring.
7. How much does it typically cost to repair the throttle position sensor 'A' circuit high voltage problem in a Honda?
- The cost of repairs can vary depending on the extent of the issue, but it may range from $100 to $300 for parts and labor.
8. Can a DIY enthusiast replace the throttle position sensor in a Honda to fix the P0123 code?
- Yes, replacing the throttle position sensor can be a DIY project for those with automotive repair experience and the necessary tools. However, proper diagnosis is crucial to ensure the sensor is the root cause of the issue.
9. Are there any preventive maintenance tips to avoid the throttle position sensor 'A' circuit high voltage issue in a Honda?
- Regularly inspecting the sensor and its connections for wear or damage, keeping up with recommended maintenance schedules, and avoiding harsh driving conditions can help prevent this issue.
10. How long does it take to repair the throttle position sensor 'A' circuit high voltage issue in a Honda?
- The repair time can vary depending on the extent of the issue and the availability of parts, but it typically takes a few hours to a full day to diagnose and fix the problem.
Discuss the causes and fixes for P0123 Honda OBDII Code
Code P0123 Honda comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.