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Engine-Codes – Dodge – P0123 Dodge

P0123 Dodge Code - Throttle Position Sensor/Accelerator Position Pedal Circuit High Input

Quick Answer

The P0123 diagnostic trouble code (DTC) for Dodge vehicles indicates a problem with the Throttle Position Sensor (TPS) or Accelerator Position Pedal Circuit having a high input signal. Common causes include Failed Throttle Position Sensor (TPS), Faulty Accelerator Pedal Position Sensor, Damaged wiring or connectors in the sensor 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 Dodge indicates Throttle Position Sensor/Accelerator Position Pedal Circuit High Input.
Common causes
Common causes include Failed Throttle Position Sensor (TPS), Faulty Accelerator Pedal Position Sensor, Damaged wiring or connectors in the sensor 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0123 Dodge Description

The P0123 diagnostic trouble code (DTC) for Dodge vehicles indicates a problem with the Throttle Position Sensor (TPS) or Accelerator Position Pedal Circuit having a high input signal. The TPS is a crucial component of the engine management system, as it monitors the position of the throttle valve and sends this information to the Engine Control Module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing for optimal engine performance. When the ECM detects a high voltage input from the TPS or accelerator pedal position sensor, it triggers the P0123 code.

OBDII Code P0123 Dodge - Throttle Position Sensor/Accelerator Position Pedal Circuit High Input
P0123 Dodge Code - Throttle Position Sensor/Accelerator Position Pedal Circuit High Input

Common Causes of P0123 Dodge

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

Symptoms of P0123 Dodge

  1. Rough idling or unstable engine speed
  2. Delayed or unresponsive throttle response
  3. Reduced engine power or acceleration
  4. Illumination of the Check Engine Light
  5. Vehicle going into "limp mode" to protect the engine

How to Fix P0123 Dodge

  1. Begin by connecting a diagnostic scanner to retrieve the specific trouble code and confirm the P0123 error.
  2. Inspect the TPS and accelerator pedal position sensor for any visible damage or wear. Replace any faulty sensors.
  3. Check the wiring and connectors in the sensor circuit for corrosion, breaks, or loose connections. Repair or replace as needed.
  4. Test the ECM for proper functionality and reprogram if necessary.
  5. Clear the error code from the ECM's memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0123 Dodge

The cost of repairing a P0123 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, replacing a faulty Throttle Position Sensor or Accelerator Pedal Position Sensor can cost between $50 and $200 for the part alone. Labor costs typically range from $100 to $200, with the total repair bill averaging between $150 and $400. Keep in mind that additional diagnostic time may be required to pinpoint the exact cause of the problem, so it's advisable to consult with a qualified mechanic for an accurate estimate based on your vehicle's make and model.

When is the Code Detected?

The P0123 code will set if the monitored TPS volts rise above 4.94 volts for the peroid of 0.48 seconds

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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 Dodge Code

1. What are the common symptoms of OBDII code P0123 in a Dodge vehicle?

- Common symptoms of code P0123 include issues with acceleration, sluggish performance, stalling, and in some cases, the vehicle may go into "limp mode" where power is severely limited.

2. What does the OBDII code P0123 indicating in a Dodge vehicle?

- OBDII code P0123 indicates that the Engine Control Module (ECM) has detected a high input signal from the throttle position sensor or accelerator pedal position sensor circuit.

3. What are the possible causes of OBDII code P0123 in a Dodge?

- The possible causes of code P0123 include a faulty throttle position sensor, a malfunctioning accelerator pedal position sensor, damaged wiring or connectors in the circuit, or issues with the ECM.

4. How can I diagnose the OBDII code P0123 in my Dodge?

- Diagnosing code P0123 involves using a scan tool to retrieve the trouble codes, checking the throttle position sensor and accelerator pedal position sensor for proper operation, inspecting the wiring and connectors for damage, and testing the ECM if necessary.

5. Can I still drive my Dodge with OBDII code P0123 present?

- It is not recommended to drive your vehicle with code P0123 present as it can lead to potential safety hazards and further damage to the engine or transmission due to the compromised throttle control.

6. Is it safe to reset the OBDII code P0123 in my Dodge and continue driving?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing code P0123 is not addressed, the problem will likely reoccur, and continued driving could lead to more significant issues.

7. How can I repair OBDII code P0123 in my Dodge?

- Repairing code P0123 typically involves replacing the faulty throttle position sensor or accelerator pedal position sensor, repairing any damaged wiring or connectors, and clearing the trouble codes from the ECM.

8. Can a DIY enthusiast fix OBDII code P0123 in a Dodge, or is it best left to professionals?

- While some experienced DIY enthusiasts may be able to diagnose and repair code P0123 themselves, it is recommended to consult a professional mechanic, especially when dealing with electronic components like sensors and the ECM.

9. Will OBDII code P0123 cause my Dodge to fail an emissions test?

- Yes, code P0123 can cause your Dodge to fail an emissions test as it indicates a potential issue with the throttle position sensor or accelerator pedal position sensor, which are critical components for engine performance and emissions control.

10. How much can I expect to pay for repairing OBDII code P0123 in my Dodge at a repair shop?

- The cost of repairing code P0123 can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of parts needed for the repair. It is advisable to get a diagnostic and repair estimate from a trusted mechanic.

Discuss the causes and fixes for P0123 Dodge OBDII Code

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  • If you get this code along with a P0068 on a 2nd gen Dodge Durango, take a hard look at the TPS. This has happened to me 2 times now and changing the TPS out corrected the issues. Very easy $30 fix.

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