AutoCodes – Honda – P0123 2000 Honda Civic

P0123 2000 Honda Civic Code - Throttle Position Sensor/Switch 'A' Circuit High Voltage

Quick Answer

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. 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 2000 Honda Civic indicates Throttle Position Sensor/Switch 'A' Circuit High Voltage.
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
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.

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Code Popularity 7,481

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0123 2000 Honda Civic Description

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0123 2000 Honda Civic - Throttle Position Sensor/Switch 'A' Circuit High Voltage - AutoCodes.com — P0123 2000 Honda Civic Code - Throttle Position Sensor/Switch 'A' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0123 2000 Honda Civic?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0123 2000 Honda Civic?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0123 2000 Honda Civic code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 2000 Honda Civic Code

1. What are the common symptoms of OBDII code P0123 in a 2000 Honda Civic?

- Common symptoms include issues with acceleration, stalling, rough idling, and a decrease in fuel efficiency.

2. What does the OBDII code P0123 for a 2000 Honda Civic mean?

- The code indicates a high voltage condition in the Throttle Position Sensor/Switch 'A' Circuit.

3. What are the possible causes of OBDII code P0123 in a 2000 Honda Civic?

- Potential causes include a faulty throttle position sensor, damaged wiring or connectors in the circuit, or a malfunctioning Engine Control Module (ECM).

4. How do I diagnose the Throttle Position Sensor/Switch 'A' Circuit issue in my 2000 Honda Civic?

- You can use a multimeter to test the voltage output of the throttle position sensor and inspect the wiring and connectors for any visible damage.

5. Can I drive my 2000 Honda Civic with OBDII code P0123?

- It is not recommended to drive with this code as it can lead to performance issues and potential safety concerns.

6. How can I repair OBDII code P0123 in my 2000 Honda Civic?

- The repair typically involves replacing the throttle position sensor, repairing any damaged wiring or connectors, or resetting the ECM.

7. Will resetting the ECM resolve OBDII code P0123 in my 2000 Honda Civic?

- Resetting the ECM may temporarily clear the code, but it is crucial to diagnose and address the underlying issue to prevent it from recurring.

8. Is it possible to fix OBDII code P0123 in a 2000 Honda Civic myself?

- Depending on your automotive repair skills, you may be able to replace the throttle position sensor or repair the wiring yourself. However, professional diagnosis and repair are recommended for complex issues.

9. How much does it cost to repair OBDII code P0123 in a 2000 Honda Civic?

- The cost of repair can vary based on the extent of the issue, parts needed, and labor rates. It is advisable to obtain quotes from reputable mechanics or service centers.

10. Can a faulty throttle position sensor cause other issues in a 2000 Honda Civic?

- Yes, a faulty throttle position sensor can lead to poor engine performance, transmission shifting problems, and overall drivability issues in the vehicle.