P0420 2012 Ford Fusion Code - Catalyst System Efficiency Below Threshold Bank 1
Quick Answer
The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor). Common causes include Faulty Three-way Catalyst Converter Bank 1, Exhaust Tube, Intake Air Leaks. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0420 2012 Ford Fusion indicates Catalyst System Efficiency Below Threshold Bank 1.
- Common causes
- Common causes include Faulty Three-way Catalyst Converter Bank 1, Exhaust Tube, Intake Air Leaks.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0420 2012 Ford Fusion Description
A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.
What are the Possible Causes of the DTC P0420 2012 Ford Fusion?
- Faulty Three-way Catalyst Converter Bank 1
- Exhaust Tube
- Intake Air Leaks
- Faulty Oxygen (O2) Sensor
- Faulty Fuel injector(s)
- Leaking Fuel Injector (s)
- Faulty Spark plugs
- Improper Ignition Timing
- Faulty Engine Control Module (ECM)
- Dirty Air Filter
How to Fix the DTC P0420 2012 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0420 2012 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 P0420 2012 Ford Fusion code?
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Frequently Asked Questions about P0420 2012 Ford Fusion Code
1. What are common symptoms of the P0420 code in a 2012 Ford Fusion?
The common symptoms of the P0420 code in a 2012 Ford Fusion include a check engine light illuminated on the dashboard, poor fuel efficiency, and decreased engine performance.
2. What does the P0420 code indicate in a 2012 Ford Fusion?
The P0420 code in a 2012 Ford Fusion indicates that the catalytic converter's efficiency on Bank 1 is below the threshold set by the vehicle's onboard diagnostics system.
3. What are the possible causes of the P0420 code in a 2012 Ford Fusion?
Possible causes of the P0420 code in a 2012 Ford Fusion include a faulty catalytic converter, damaged oxygen sensors, exhaust leaks, engine misfires, or issues with the fuel system.
4. How can I diagnose the P0420 code in a 2012 Ford Fusion?
Diagnosing the P0420 code in a 2012 Ford Fusion involves checking the oxygen sensor readings, inspecting the catalytic converter for physical damage, and looking for exhaust leaks in the system.
5. Can I still drive my 2012 Ford Fusion with the P0420 code?
While it may be possible to drive your 2012 Ford Fusion with the P0420 code, it is not recommended as it can lead to further damage to the vehicle and may result in decreased fuel efficiency and engine performance.
6. How can I repair the P0420 code in a 2012 Ford Fusion?
Repairing the P0420 code in a 2012 Ford Fusion may involve replacing the catalytic converter, repairing exhaust leaks, replacing faulty oxygen sensors, addressing engine misfires, or fixing issues with the fuel system.
7. Will resetting the check engine light fix the P0420 code in a 2012 Ford Fusion?
Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the P0420 code in a 2012 Ford Fusion. It is important to diagnose and repair the problem to prevent further issues.
8. How much does it cost to repair the P0420 code in a 2012 Ford Fusion?
The cost of repairing the P0420 code in a 2012 Ford Fusion can vary depending on the specific cause of the issue. Costs may include parts such as a new catalytic converter or oxygen sensors, as well as labor charges for the repair.
9. Are there any preventive measures to avoid the P0420 code in a 2012 Ford Fusion?
To help prevent the P0420 code in a 2012 Ford Fusion, it is important to perform regular maintenance on the vehicle, address any engine performance issues promptly, and use high-quality fuel to reduce the likelihood of catalyst system problems.
10. Can a DIY enthusiast fix the P0420 code in a 2012 Ford Fusion?
While some aspects of diagnosing and repairing the P0420 code in a 2012 Ford Fusion may be suitable for experienced DIY enthusiasts, it is recommended to seek professional help for this issue due to the complexity of the catalytic converter and emission system components.
Discuss the causes and fixes for P0420 2012 Ford Fusion OBDII Code
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I actually have a 2016 ford fushion with same code. The code seems to pop right after I fill the tank. It has happened twice in last 7 to 10 days. I have about 33k miles on car. I do get an evap code along with the po420 code but cel usually goes out on own after about a day and a half but only stores the po420 code. Any thoughts?
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