AutoCodes – Ford – P0121 2009 Ford Fusion

P0121 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance

Quick Answer

The throttle position (TP) sensor circuit is monitored by the Powertrain Control Module (PCM) for a non-closed throttle position at idle. Common causes include Dirty throttle plate, Faulty throttle position sensor, Throttle position sensor harness is open or shorted. 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: P0121 2009 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance.
Common causes: Common causes include Dirty throttle plate, Faulty throttle position sensor, Throttle position sensor harness is open or shorted.
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 2,624

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

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

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0121 2009 Ford Fusion Description

The throttle position (TP) sensor circuit is monitored by the Powertrain Control Module (PCM) for a non-closed throttle position at idle. The test fails if the key on engine running (KOER) self-test terminates upon placing the transmission gear selector in DRIVE or REVERSE or the TP closed throttle position is not achieved when closing the throttle (idle) after opening it (in PARK or NEUTRAL).

OBDII Code P0121 2009 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance - AutoCodes.com — P0121 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0121 2009 Ford Fusion?

Dirty throttle plate
Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0121 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 does this mean?

Code Tech Notes

You can try to clean the throttle body, before any other repairs.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0121 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.

Need more information about the P0121 2009 Ford Fusion code?

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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 P0121 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P0121 on a 2009 Ford Fusion?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and illuminated check engine light.

2. What does the OBDII code P0121 for a 2009 Ford Fusion indicate?

- The code P0121 indicates an issue with the Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance.

3. What are the possible causes of OBDII code P0121 on a 2009 Ford Fusion?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, throttle body issues, or a problem with the engine control module.

4. How can I diagnose the OBDII code P0121 on my 2009 Ford Fusion?

- Diagnosing the code involves using a scan tool to check for the specific error code, testing the throttle position sensor and associated wiring, and inspecting the throttle body for any issues.

5. Can I still drive my 2009 Ford Fusion with OBDII code P0121?

- It is not recommended to drive the vehicle with code P0121 as it can lead to performance issues and potential safety hazards. It is best to address the problem promptly.

6. How can I repair OBDII code P0121 on my 2009 Ford Fusion?

- Repair options include replacing the throttle position sensor, repairing any damaged wiring or connectors, cleaning the throttle body, or reprogramming the engine control module.

7. Are there any DIY tips for fixing OBDII code P0121 on a 2009 Ford Fusion?

- DIY tips include checking and cleaning the throttle body, inspecting the wiring for any visible damage, and ensuring all connections are secure before seeking professional help.

8. How much does it typically cost to fix OBDII code P0121 on a 2009 Ford Fusion?

- The cost of repair can vary depending on the specific issue causing the code. It may range from a simple sensor replacement to more extensive repairs involving the throttle body or engine control module.

9. Will resetting the OBDII code P0121 on my 2009 Ford Fusion make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is crucial to diagnose and fix the root cause.

10. Is OBDII code P0121 a common issue in 2009 Ford Fusion vehicles?

- While the code P0121 can occur in 2009 Ford Fusion vehicles, it is not extremely common. However, it is essential to address the problem promptly to avoid potential performance issues.