AutoCodes – Ford – P2122 2008 Ford Fusion

P2122 2008 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 2008 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 2,075

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 2008 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 2008 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low - AutoCodes.com — P2122 2008 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2122 2008 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 2008 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 2008 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 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P2122 in a 2008 Ford Fusion?

The common symptoms of code P2122 include reduced engine power, throttle response issues, and the vehicle going into limp mode.

2. What does the Throttle/Pedal Position Sensor/Switch 'D' Circuit Low mean in a 2008 Ford Fusion?

The code P2122 indicates that there is a low voltage condition in the circuit related to the throttle or pedal position sensor/switch 'D'.

3. What are the possible causes of OBDII code P2122 in a 2008 Ford Fusion?

Possible causes of code P2122 include a faulty throttle position sensor, damaged wiring or connectors, a defective pedal position sensor, or a problem with the Engine Control Module (ECM).

4. How can I diagnose the Throttle/Pedal Position Sensor/Switch 'D' Circuit Low in my 2008 Ford Fusion?

Diagnosing code P2122 involves using a scan tool to retrieve the code, checking the throttle and pedal position sensor readings, inspecting wiring and connectors for damage, and testing the sensor circuit.

5. Can I continue driving my 2008 Ford Fusion with OBDII code P2122?

It is not recommended to drive the vehicle with code P2122 as it can lead to unsafe driving conditions and potential damage to the engine or other components.

6. How can I repair OBDII code P2122 in a 2008 Ford Fusion?

To repair code P2122, you may need to replace the faulty throttle position sensor, repair damaged wiring or connectors, replace the pedal position sensor, or reprogram the ECM.

7. Is it possible to reset OBDII code P2122 in a 2008 Ford Fusion?

Resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to reappear. It's essential to diagnose and repair the root cause of the problem.

8. How much does it typically cost to fix OBDII code P2122 in a 2008 Ford Fusion?

The cost of fixing code P2122 can vary depending on the cause of the issue, the parts needed for repair, and labor costs. It is recommended to consult with a mechanic for an accurate estimate.

9. Can a DIY enthusiast repair OBDII code P2122 in a 2008 Ford Fusion?

While some aspects of diagnosing and repairing code P2122 can be tackled by a DIY enthusiast, it may require specialized tools and expertise. It's advisable to seek professional help if unsure.

10. How can I prevent OBDII code P2122 from appearing in my 2008 Ford Fusion in the future?

Regular maintenance, such as checking and cleaning throttle components, inspecting wiring for damage, and addressing any issues promptly, can help prevent code P2122 from recurring.