AutoCodes – Ford – P2121 2011 Ford Fusion

P2121 2011 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance

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: P2121 2011 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance.
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 2,027

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
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Code P2121 2011 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 APP sensor fault flag is set for sensor 1 by the PCM, indicating the signal is out of the normal self-test operating range.

OBDII Code P2121 2011 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance - AutoCodes.com — P2121 2011 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2121 2011 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 P2121 2011 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 P2121 2011 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 P2121 2011 Ford Fusion Code

1. What are the common symptoms of OBDII code P2121 in a 2011 Ford Fusion?

- Common symptoms include issues with throttle response, poor acceleration, reduced engine power, and the illumination of the Check Engine Light.

2. What does the OBDII code P2121 indicate in a 2011 Ford Fusion?

- OBDII code P2121 indicates a problem with the Throttle/Pedal Position Sensor/Switch 'D' Circuit Range/Performance.

3. What are the potential causes of OBDII code P2121 in a 2011 Ford Fusion?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the throttle body.

4. How can I diagnose the issue causing OBDII code P2121 in my 2011 Ford Fusion?

- To diagnose the problem, you can use a diagnostic scanner to retrieve the trouble codes, inspect the throttle position sensor and related wiring, and perform a thorough visual inspection.

5. Can I still drive my 2011 Ford Fusion with OBDII code P2121 present?

- It is not recommended to drive your vehicle with OBDII code P2121, as it can lead to further damage and unsafe driving conditions due to potential throttle-related issues.

6. How can I repair OBDII code P2121 in my 2011 Ford Fusion?

- Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, and cleaning or replacing the throttle body if necessary.

7. Is it possible to reset OBDII code P2121 in a 2011 Ford Fusion without making any repairs?

- While clearing the code may temporarily turn off the Check Engine Light, it is important to address the underlying issue causing OBDII code P2121 to prevent future problems.

8. How much does it typically cost to fix OBDII code P2121 in a 2011 Ford Fusion?

- The cost of fixing OBDII code P2121 can vary depending on the root cause of the issue, but it may involve sensor replacement, wiring repairs, or throttle body servicing, which could range from $100 to $500 or more.

9. Are there any preventive maintenance tips to avoid OBDII code P2121 in a 2011 Ford Fusion?

- Regularly inspecting and maintaining the throttle position sensor, ensuring proper wiring connections, and following the manufacturer's recommended service schedule can help prevent issues leading to code P2121.