AutoCodes – Ford – P2123 2006 Ford Fusion

P2123 2006 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High

Quick Answer

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) 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: P2123 2006 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit High.
Common causes: Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) 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 1,698

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

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

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2123 2006 Ford Fusion Description

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. There are 2 pedal position signals in the sensor. Both signals, APP and APP2, have a positive slope (increasing angle, increasing voltage), but are offset and increase at different rates. The 2 pedal position signals make sure the PCM receives a correct input even if 1 signal has a concern. The PCM determines if a signal is incorrect by calculating where it should be, inferred from the other signals. If a concern is present with one of the circuits the other input is used. There are 2 reference voltage circuits, 2 signal return circuits, and 2 signal circuits (a total of 6 circuits and pins) between the PCM and the APP sensor assembly. The pedal position signal is converted to pedal travel degrees (rotary angle) by the PCM. The software converts these degrees to counts, which is the input to the torque based strategy. The P2123 code sets when The accelerator pedal position (APP) sensor 1 is out of self-test range high.

OBDII Code P2123 2006 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit High - AutoCodes.com — P2123 2006 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High

What does this mean?

What are the Possible Causes of the DTC P2123 2006 Ford Fusion?

Faulty Accelerator Pedal Position (APP) Sensor
Accelerator Pedal Position (APP) Sensor harness is open or shorted
Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2123 2006 Ford Fusion?

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 P2123 2006 Ford Fusion 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 P2123 2006 Ford Fusion Code

1. What are common symptoms of OBDII code P2123 on a 2006 Ford Fusion?

- Common symptoms include reduced engine power, acceleration issues, and the vehicle going into limp mode.

2. What are the potential causes of OBDII code P2123 on a 2006 Ford Fusion?

- The potential causes could be a faulty throttle position sensor, damaged wiring or connectors, or issues with the throttle pedal position sensor.

3. How can I diagnose the Throttle/Pedal Position Sensor/Switch 'D' Circuit High code on my 2006 Ford Fusion?

- You can diagnose the code by using an OBDII scanner to read the code, inspecting the throttle position sensor and pedal position sensor, and checking for any damaged wiring or connectors.

4. Can I continue driving my 2006 Ford Fusion with OBDII code P2123?

- It is not recommended to continue driving with this code as it can lead to further damage and potential safety hazards. It's best to have the issue diagnosed and repaired promptly.

5. How can I repair OBDII code P2123 on my 2006 Ford Fusion?

- Repairing the code may involve replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, or addressing any issues with the throttle pedal position sensor.

6. Will resetting the OBDII code P2123 on my 2006 Ford Fusion make it go away permanently?

- Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, it is likely to reappear.

7. Are there any DIY tips for troubleshooting OBDII code P2123 on a 2006 Ford Fusion?

- DIY tips include checking for loose or damaged wiring, ensuring proper connections to the throttle position and pedal position sensors, and cleaning any corrosion on connectors.

8. Can a faulty throttle position sensor cause OBDII code P2123 on a 2006 Ford Fusion?

- Yes, a faulty throttle position sensor is a common cause of this code as it can lead to incorrect voltage signals being sent to the vehicle's computer.

9. How much does it typically cost to repair OBDII code P2123 on a 2006 Ford Fusion?

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

10. Is it possible for OBDII code P2123 on a 2006 Ford Fusion to trigger other related codes?

- Yes, it is possible for this code to trigger other related codes such as P2122 (Throttle/Pedal Position Sensor/Switch 'D' Circuit Low) or P2121 (Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance).