Ford Error Code P0420

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P0420 Honda

By Ken Schafer Jr. © Reproduced with permission from Undercar Digest. For subscription information call 800-274-7890 or visit www.mdpublications.com. Upon the arrival of the Onboard Diagnostics II (OBD-II) system, I remember thinking to myself that this new system was going to be the greatest thing to happen to vehicles since I had started working on them. Now all I needed to do was plug in a scan tool, since all vehicles would have the same p0420 nissan data-link connector (DLC) much to my delight again, and the car would tell me what was wrong with it. Sadly, it was only a few weeks later that I learned that this new system was still only a guideline and not a complete diagnosis. Throughout the years, after the start of OBD-II, it has become more and more accurate, but it still requires a bit of investigating after retrieval of the diagnostic trouble codes (DTCs). The P0420 code is no different. Here is a scenario: A customer pulls into the shop and says, “My check-engine light is on.” I tell them that I will scan the vehicle and find out what the problem is. Once I hook the scan tool up and navigate through the setup menus and click on display codes, I see P0420. Then I click the display code data and the scan tool says “Converter efficiency below threshold.” I crane my head out of the driver’s seat and yell to the manager that the vehicle needs a converter. This may not be true, as further diagnosis is necessary. From here on, I will try to explain some of the more-general steps I would take when diagnosing a converter with a scan tool. I will stay away from any finer points, as there are variances from manufacturer to manufacturer, but us

that specific trouble code. If your car's check engine light is on, get that code read in case it's a P0420. A P0420 code is a trouble code on OBD-II equipped vehicles. All vehicles from 1996-newer sold in North America support this generic powertrain code. This p0420 honda civic code is a pretty common one and this site is here to help the average do-it-yourself (DIY)

P0420 Fix

car owner (like you) troubleshoot, diagnose, and fix their vehicle themselves when presented with a P0420 code, saving money. If your car has multiple trouble codes

P0420 Subaru

(DTC's), it's always a good idea to fix them in the order they come up on the code reader. For example, if you have these codes - P0300, P0420, P0171, then you're going to want to tackle the P0300 Random Misfire code http://www.easterncatalytic.com/education/tech-tips/the-misleading-nature-of-the-po42o-code/ first (resolve it), and then tackle the P0420 code, etc. The reason for that is that the first code could be causing further DTCs to be set. If you've come to this site you most likely already know that you have a P0420 code. To start, we strongly recommend you seek the services of a professional mechanic/technician if you have any doubts as to whether you can perform the repair! Also, be sure to follow proper diagnostic procedures to determine whether a part has failed. If http://www.p0420.com/ you simply change parts hoping it will solve the problem, you're really just guessing and wasting money. This site is here for information purposes only and is meant to help you learn more about the dtc and decide if you can tackle the repair yourself. It is not intended as car repair advice. OK, so what does a P0420 code mean anyway? As mentioned above, the code's description is Catalyst System Efficiency Below Threshold (Bank 1). OK, now tell me that again in plain English please.... let's break it down: the catalyst system being referred to is your three-way catalytic converter; so the catalytic converter is not working properly (i.e. it's not efficient). Bank 1 refers to the side of the engine which contains cylinder #1. On inline engines such as 4 & 5 cylinder engines, there is only one bank. So, to really simply things let's just say that the efficiency of the catalytic converter and/or exhaust pipe and/or O2 sensor is not so great. There are no symptoms so why should I fix it? Great question! A P0420 code will cause no symptoms aside from the MIL (malfunction indicator light) will illuminate. The reality is there is still something wrong and your car needs attention in order to be in excellent running condition. A poorly maintained car will run less efficiently, burn more gas, and cost you more money in the long run. Plus, if your check engine light is on for a P0420 code and you decide not to fix

Du siehst YouTube auf Deutsch. Du kannst diese Einstellung unten ändern. Learn more You're viewing YouTube in German. You can change this preference below. Schließen Ja, ich möchte sie behalten Rückgängig https://www.youtube.com/watch?v=FCTEmWo7FEE machen Schließen Dieses Video ist nicht verfügbar. WiedergabelisteWarteschlangeWiedergabelisteWarteschlange Alle entfernenBeenden Wird geladen... Wiedergabeliste Warteschlange __count__/__total__ Beating the P0420 Check Engine Code! jaykay18 AbonnierenAbonniertAbo beenden4.1304 Tsd. Wird geladen... Wird geladen... http://www.autocodes.com/p0420_ford.html Wird verarbeitet... Hinzufügen Möchtest du dieses Video später noch einmal ansehen? Wenn du bei YouTube angemeldet bist, kannst du dieses Video zu einer Playlist hinzufügen. Anmelden Teilen Mehr p0420 honda Melden Möchtest du dieses Video melden? Melde dich an, um unangemessene Inhalte zu melden. Anmelden Transkript Statistik 212.113 Aufrufe 83 Dieses Video gefällt dir? Melde dich bei YouTube an, damit dein Feedback gezählt wird. Anmelden 84 169 Dieses Video gefällt dir nicht? Melde dich bei YouTube an, damit dein Feedback gezählt wird. Anmelden 170 Wird geladen... ford error code Wird geladen... Transkript Das interaktive Transkript konnte nicht geladen werden. Wird geladen... Wird geladen... Die Bewertungsfunktion ist nach Ausleihen des Videos verfügbar. Diese Funktion ist zurzeit nicht verfügbar. Bitte versuche es später erneut. Veröffentlicht am 16.11.2012Originally recorded October 26, 2012.Also seePart 2: http://www.youtube.com/watch?v=K40aLg...Part 3: http://www.youtube.com/watch?v=HL4K7C...It was time to get the car inspectorated. I've had a Check Engine Light on for quite some time now, P0420.You have a small window of opportunity to do this, and you will need an OBDII Scan Tool that will show you the readiness monitors and their status.If you have a P0420 code, this could be caused by a number of different things. Mainly it will indicate that the reading of the rear O2 sensor is very similar to the front O2 sensor. This could be due to a bad O2 sensor (front or rear), faulty wiring to those sensors, or worse, a bad catalytic converter or ECM.When you use a scan tool to reset the check engine light, it resets a

Repair Difficulty Level:2/3 | Add Comment http://www.autocodes.com/p0420_ford.html Forum Code Possible causes - Three way catalyst converter Bank 1- Exhaust tube- Intake air leaks- Fuel injectors may be faulty- Fuel injector leaks- Spark plugs may be faulty- Improper ignition timing- Engine Control Module (ECM) What does this mean? Tech notes As the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0420 code is combined with other codes, try fixing the other codes first.User Submitted Video What does this mean? When is the code detected?- Three way catalytic converter Bank 1 does not operate properly.- Three way catalyst converter Bank 1 does not have enough oxygen storage capacity. Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light) P0420 Ford Description 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).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. P0420 Ford Information for specific Ford models P0420 1997 FORD F150 P0420 1998 FORD F150 P0420 1999 FORD F150 P0420 2000 FORD F150 P0420 2001 FORD F150 P0420 2002 FORD F150 P0420 2003 FORD F150 P0420 2006 FORD FUSION P0420 2007 FORD FUSION P0420 2008 FORD FUSION P0420 2009 FORD FUSION P0420 2010 FORD FUSION P0420 2011 FORD FUSION P0420 2012 FORD FUSION Need more help? Do you need more help with the P0420 Ford code? Ask a question