AutoCodes – Ford – P0172 2011 Ford Fusion

P0172 2011 Ford Fusion Code - System Too Rich Bank 1

Quick Answer

The adaptive fuel strategy continuously monitors the fuel delivery hardware. Common causes include Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor. 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
P0172 2011 Ford Fusion indicates System Too Rich Bank 1.
Common causes
Common causes include Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 4,364
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 02, 2020
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Code P0172 2011 Ford Fusion Description

The adaptive fuel strategy continuously monitors the fuel delivery hardware. The test fails when the adaptive fuel tables reach a lean calibrated limit.
OBDII Code P0172 2011 Ford Fusion - System Too Rich Bank 1 - AutoCodes.com
P0172 2011 Ford Fusion Code - System Too Rich Bank 1

What are the Possible Causes of the DTC P0172 2011 Ford Fusion?

  • Faulty Front Heated Oxygen Sensor
  • Faulty Spark Plugs
  • Faulty Mass Air Flow (MAF) sensor
  • Exhaust Gas Leaks
  • Ignition Misfiring
  • Incorrect Fuel Pressure
  • Faulty Fuel Injectors

How to Fix the DTC P0172 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 P0172 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.

Need more information about the P0172 2011 Ford Fusion code?

Need more information on how to fix the P0172 2011 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0172 2011 Ford Fusion code diagnosed by a professional: Find a repair shop in your area

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 P0172 2011 Ford Fusion Code

1. What does OBDII code P0172 for a 2011 Ford Fusion mean?

The code P0172 on a 2011 Ford Fusion indicates that the engine control module has detected a too rich fuel mixture on bank 1.

2. What are the common symptoms of OBDII code P0172 on a 2011 Ford Fusion?

Common symptoms of code P0172 in a 2011 Ford Fusion include decreased fuel efficiency, rough idling, black smoke from the exhaust, and a strong smell of fuel.

3. What are the possible causes of OBDII code P0172 on a 2011 Ford Fusion?

Common causes of code P0172 on a 2011 Ford Fusion include a faulty oxygen sensor, a dirty or clogged fuel injector, a malfunctioning mass airflow sensor, or a vacuum leak.

4. How can I diagnose the OBDII code P0172 on my 2011 Ford Fusion?

Diagnosing code P0172 on a 2011 Ford Fusion involves checking the oxygen sensor readings, inspecting the fuel injectors, testing the mass airflow sensor, and performing a smoke test to identify any vacuum leaks.

5. What are the repair options for OBDII code P0172 on a 2011 Ford Fusion?

Repair options for code P0172 on a 2011 Ford Fusion include replacing the faulty oxygen sensor, cleaning or replacing clogged fuel injectors, cleaning the mass airflow sensor, and repairing any vacuum leaks.

6. Can driving with OBDII code P0172 on a 2011 Ford Fusion cause further damage?

Continuing to drive with code P0172 on a 2011 Ford Fusion can lead to decreased engine performance, potential damage to the catalytic converter, and increased fuel consumption.

7. How much does it typically cost to repair OBDII code P0172 on a 2011 Ford Fusion?

The cost of repairing code P0172 on a 2011 Ford Fusion can vary depending on the specific cause, but it may range from $100 for a simple fix like replacing an oxygen sensor to $500 or more for more extensive repairs.

8. Can I reset the OBDII code P0172 on my 2011 Ford Fusion without fixing the underlying issue?

While you can clear the code temporarily, it will likely return if the underlying issue causing the rich fuel mixture is not addressed. It's important to diagnose and repair the problem to prevent further issues.

9. Is OBDII code P0172 common in 2011 Ford Fusion vehicles?

Code P0172, indicating a too rich fuel mixture, can occur in 2011 Ford Fusion vehicles due to various reasons like sensor malfunctions or fuel system issues. It's not uncommon, and prompt diagnosis is recommended.

10. Can a DIY enthusiast effectively fix OBDII code P0172 on a 2011 Ford Fusion?

Depending on the cause, a DIY enthusiast may be able to address code P0172 on a 2011 Ford Fusion by replacing sensors or cleaning components. However, complex issues like vacuum leaks may require professional assistance.

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