AutoCodes – Ford – P2122 2009 Ford Fusion

P2122 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

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: P2122 2009 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit Low.
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 1,761

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 P2122 2009 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 P2122 code sets when The accelerator pedal position (APP) sensor 1 is out of self-test range low.

OBDII Code P2122 2009 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low - AutoCodes.com — P2122 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2122 2009 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 P2122 2009 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 P2122 2009 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 P2122 2009 Ford Fusion Code

1. What does the OBDII code P2122 mean for a 2009 Ford Fusion?

P2122 indicates a "Throttle/Pedal Position Sensor/Switch 'D' Circuit Low," meaning the powertrain control module (PCM) has detected a low voltage signal from the throttle or pedal position sensor.

2. What are the common symptoms of code P2122?

Symptoms include reduced engine performance, a lack of throttle response, the accelerator pedal not working properly, and the vehicle potentially entering "limp mode."

3. What causes the P2122 code to appear?

The most common causes are a faulty throttle position sensor, damaged wiring or connectors in the circuit, a malfunctioning accelerator pedal position sensor, or a problem with the PCM.

4. Can I drive my 2009 Ford Fusion with the P2122 code?

It is not recommended to drive with this code active, as it can lead to reduced performance and safety concerns due to limited throttle functionality.

5. How do I diagnose the P2122 code on my Ford Fusion?

Start by inspecting the wiring and connectors for the throttle and pedal position sensors. Use a multimeter to check for proper voltage and continuity in the circuit. If necessary, scan live data to monitor sensor output.

6. What repairs can fix the P2122 code?

Repairs may include replacing the throttle position sensor, accelerator pedal position sensor, or repairing damaged wiring and connectors. In rare cases, the PCM may need to be reprogrammed or replaced.

7. How much does it cost to fix the P2122 code?

Depending on the issue, repairs can range from $100 to $400, with sensor replacements generally being less expensive than PCM-related fixes.

8. Can a dirty throttle body cause the P2122 code?

No, a dirty throttle body is not typically a cause of this code, as it specifically relates to electrical issues in the throttle/pedal position sensor circuit.

9. Will clearing the code with a scanner fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be diagnosed and repaired to prevent the code from returning.

10. Does the P2122 code require professional repair?

If you're experienced with automotive electronics, you may be able to diagnose and fix the issue yourself. Otherwise, it's best to consult a professional mechanic for accurate troubleshooting and repair.