I suspect they did not do much more than that. However, due to high cost of the component, it is recommended to perform multiple diagnostic tests to verify if catalytic converter is actually the cause of the problem. Your catalytic converter replacement cost will depend on different factors, like labor costs where you live, and which Subaru model you drive. I cant believe you are still answering questions about this code, thanks! You can read here for more information about how the system works, and its always a good idea to buy your own code scanner. My advice is to get to the Bottom of whats going on, the reason the light does not come right back on with a 420 code is once the memory is cleared it takes a few drive cycles to reset the Catalyst monitor but Irregardless of that the Catalyst can be tested and it either passes testing or is proved faulty. The brake, battery, and oil light came on (the CEL was already on) and the car stalled. If its not affecting the performance, you can put it off until you need to test for emissions if you live in an area that tests. There is 7166 miles on this allegedly new catalytic converter. If the Rear O2 sensor was tested out side of the data you gave me than yes the Catalyst is not reaching light off and will need to be replaced to satisfy the check engine light and the P0420 code. The P0172 needs to be diagnosed and addressed and it just should not be driven until it has been I am afraid. i have two light on dash vehicle dynamics control warning light and a emissions control unit malfunction engine control system light on dash. If so, how? Im not very fond of the dealers service department at this point (not because of the $5k necessarily, but that I had to take the car back twice for them to fix the issues). I work from home so I dont drive a lot myself. Would replacing the secondary O2 sensor do anything? Thank you Justin, that is good to know! Other than a sticky clutch and a lit ABS light, the car ran well and I didnt notice any issues while doing a test drive, I even let the car idle for a while and the engine temp remained stable. If you see any fault code from P0420 to P0424 or from P0430 to P0434 in the OBD2 scanner, it indicates a problem with the catalytic converter. I have her note book of every repair and maintenence item recorded with all the receipts. Only a scan of the code history will determine if its in memory still. was all ok for the day though the following morning on cold start the light re-appeared and the fuse has blown again. 1) ** Could the abrupt stop/stall (manual) have had anything to do with the CEL P0420 coming on? Noticed MPG drop right after engine work and told dealership twice. Do you know of any independent subaru qualified mechanics in my area? Dealer checked and said that yes, it might need a new converter. 2022 Subaru Outback Base {{loadingIndicator}} Hamburger menu. -Does cat affect fuel efficiency? Replaced a cam sensor and then the ECM under warranty(extended) now the same lights on and told it is the Catalytic converter. Any chance you have that other article around? Except, two weeks later, its back on. This one is a 2008 and just over two weeks ago was at a subaru dealer in St. Louis to replace the left or right front axle. Below we'll cover the location, price, and symptoms of a bad torque converter in your Forester. If the cat is tested and fails the test than it needs to be replaced, if how ever it reaches light off and still sets the code maybe its a candidate for the re programming as a first step. Tim. Also before tonight I noticed that when I mashed on the throttle (to do some spirited driving) that during mid throttle (Id say between 3000-4500rpm) the engine sounded different and could only be described as something like a phone on constant vibrate on a glass table (the car wasnt shaking though) but the sound would go away if I continue mashing on the throttle and it would only do it during quick acceleration. I have changed both O2 sensors. MAYBE you can assist me here..i have a 2011 forester diesel turbo. failure , my forester has never had replacement h.g.how can I make head gaskets last? They are now taking about replacing the catalytic converter. Yes the PZEV uses a different Catalyst Configuration. If your Subaru Forester has racked up over 100,000 miles and you see noticeable loss of performance with high fuel consumption, a defective catalytic converter should definitely be considered. When you press the gas pedal from a stopped position, the vehicle may accelerate normally initially. Hi Justin, I would appeciate your comment on my 2010 Outback. If the temperature difference is higher than 10 degrees Celsius or 50 degrees Fahrenheit, then most likely the catalytic converter is clogged. He reset and said it was fine to drive back home to my regular mechanic. The engine will die if I dont put it in neutral and give it gas.Any ideas on what is going on? So at this point all that has been learned is that the ECM is correct and there is a function issue, but until more testing is done we dont know the why. I would say yes its uncommon to need a second Catalyst at 50k after the first but I dont know if the front air fuel sensor was ever replaced or if there is something else going on? But I will save that for another article.. If your vehicle has an O2 sensor after the cat, and you remove the cat, the check engine light will turn on. EXHAUST, Engine, CP - OEM Subaru Part # 44620AA750. Most times if we make the repairs the same visit we will discount or waive the diagnostic fee. The difference in price is $300 more it seems. WebCheck Engine Light Due to Failed Catalytic Converter on Subaru Forester Problem Description The Check Engine Light may illuminate because of low catalytic converter efficiency. He was able to get a wrench on the hose clamp to tighten it down. He took it in to the Subaru dealer and they say it is a p0240 code and it needs a new catalytic converter at a cost of $1800. Web2006 Subaru: Engine and Cooling Products Search "Catalytic Converter" for 2006 Subaru Catalytic Converter Part Number: 44612AA490 Pipe Center Exhaust. I plan on putting another 70k on this car, so Im not opposed to necessary repairs/maintenance no matter the cost. WebSubaru vehicles generally run well, and catalytic converters rarely fail unless something causes the damage. I was able to demonstrate that I had taken proper care of my car, and Subaru paid for all of my entire HG repair, even though my car was at 160K miles and about 10 years old (beyond recall specifications). pollutants such as carbon monoxide, hydrocarbons, and oxides of. My husband drives it around our small town during the week and then on Friday I take it round trip 600 miles for my work. The battery was unplugged for 2 days and so the ECM was reset. exhaust cover '06my. We only ever use 93 octane. 4) **Should I just continue to drive it, with higher octane (per manual recommended 87)until the light comes on again? One of the more common codes we see on the Subaru, is P0420 CatalyticConverter Efficiency Below Threshold. Its possible after some spirited driving the Catalyst function could improve and light goes out, but under stand its a warning of things to come. Can you please explain? With 230,000 miles on it,I cant complain. Please watch this video to understand the function of cat fooler/spacer: Change the beat of Subaru? I have read that the leaking head gaskets and the additives they used to put in the oils cause the inside of the cats to deteriorate. Was the WVM 23 service campaign performed on your 2008 Outback? Try to create some Exhaust heat when driving it and that may help it light of. Appreciate it! Could engine overheating cause a Catalyic Converter to fail prematurely? I would very much appreciate your help here. Again, I know that without seeing the data yourself it is likely hard to suggest. If the Forester still suits your needs over the long run, it will cost less to maintain and make repairs as they come up as the car continues to age. There is 7166 miles on this allegedly new catalytic converter. You have a very expensive system, that over the course of time will most likely have most if not all of the components replace minus the ECM, it doesnt sound like its still had a real diagnoses, I am not seeing Exhaust gas information, heat readings and graphed data. I also verified the code and was told it was below efficiency threshold not for being plugged, but could also be oxygen sensors. I checked my gas cap but, have not driven it around to see if it resets. Full Diagram #44102B EXHAUST. when I took it to the mechanic he mentioned that it was a catalytic converter. Someone really needs to look at the Data and figure it out, is really what needs to happen. My mechanic is telling me that both O2 sensors are operational which leaves him to believe that its the front Cat. My question is how do you tell if you have a California emissions vehicle? Theconverter is made of a honeycomb ceramicstructure held in place with a Nickel supportshell, all contained in a metal housing. Poor acceleration While waiting for the tow truck I looked up the symptoms and most pointed to a bad front O2 sensor or possibly a bad TBS. The data generated is only as good as the sensor, so the sensor must be tested first. I dont want to put over $1,000 into a $2,500 car. A fuel mixture that is too rich, i.e. Not a Subaru dealer, so I think it was aftermarket. If the Cat is restricted with Carbon, that carbon will prevent the light off temperature from being realized, if the carbon can be cleaned the Catalyst may return to the light of stage. The car continues to run great. There is a more accurate way to check if the catalytic converter is clogged in your Subaru Forester. Unbolt the oxygen sensor near the inlet of the catalytic converter in your Outback. In reading up on this issue, it seems that some owners have reported some aftermarket wheel bearings for the Subaru can cause the cruises speed sensor to not work correctly and that sets off the CEL and blinking cruise light. And yet the first couple times I checked it when all this started happening, it DID seem loose! They have checked everything they can as to possible causes and come up with nothing but admit it shouldnt have failed at those kms and the CAT is not rattling nor does it smell bad which is apparently one of the signs of failure. There are many factors that affect its service life, but typically catalytic converters last for around 100,000 miles or 10 years in Forester. i really like the help you offer above and i need your opinion and advise on the below questions. Service rep stated that in some instances, the attached heat shield cannot be removed (due to rust) and needs to be replaced (which could require later revisit). what does one do i am going to buy a digital full read out obd2 connector for my phone i can leave attached to get some live data recorded but im currently left scratching my head as to what to do now Other than start collecting live data snapshots of the moment it shows up. I've heard they can get up to $1000 for the metals in Toyota cats. Reading out the fault codes using a diagnostic device is relatively reliable. Could, over time, a caps plastic threading weaken/degrade allowing it to work itself loose with regular driving?! Towed it home and put the new parts on in my garage. A sulfur or "rotten egg" smell indicates the formation of hydrogen sulfide (H 2 S), a likely sign of catalytic converter contamination. Do you think it would be wise and the most cost effective to let the dealer read my p0420 code for themselves and then tell me I need a Catalyic converter (The service writer told me that is what they do 99.9% of the time with the p0420 code). There was some sort of a condition that actually needed to be diagnosed and driving it like that did not do the Catalyst any favors. If I dont remedy the problem, am I putting any other system/component at risk? The Cat is a Subaru part muffler isnt. I have a 2001 Subaru Impreza and I got a P0420 code. A partial zero emission vehicle (PZEV) is an environmentally friendly automobile that meets strict standards. Unless the Catalyst is getting no where near the light off point? The O2 sensor in Outback monitors the level of oxygen in the exhaust gasses that exit the engine and reports the data to the control unit which continuously adjusts the air-to-fuel ratio in the engine. Ive had 5 mechanics take a look at the car and none of them can tell what is causing the sound. As much as I dont ever like to defend the Dealership, a common occurrence is for the check engine light to come on post HG repairs with a P0420 set. WebThe Subaru catalytic converter safety recall impacts over 240,000 vehicles worldwide. I see comments about an ECM reflash. It can run into problems over the normal life of the vehicle, and is often accompanied by OBDII code P0420. This same issue may cause the car to fail the State Smog Test if one is required. The industry or the market place rather does not allow for scientifically approaching the issue with a prove good or prove failed circumstance, instead its not an exact science unless you have the ability or the inclination to go one or several steps further in your diagnoses. Thanks once again so much for your wisdom! Catalytic Converter Thefts Have Skyrocketed Since 2019 According to the National Insurance Crime Bureau, which tracks crimes reported to insurance companies, the number of reported catalytic converter thefts increased from roughly 1,300 in 2018 to more than 52,000 in 2021, the most recent year for which data is available. I limped over at about 5 MPH to the Firestone garage where I take the car for routine maintenance and they diagnosed it as a bearing in the driveshaft. a Technician carried out a diagnostic procedure as per workshop manual checked resistance between relay and connectors which led to finding a blown fuse.20A Green. Hi Justin, I had to demonstrate that they should have advised me of the recall during a timing belt replacement in 2008. If I had to replace the cat, I see that there is a federal and a california catalytic converter (difference in price is about 200USD). Still getting P0420 after replacing both cats, front cat and rear cat on 2008 subaru legacy. Are you also using non OE 02 sensors? I spent 3 hours with a shop today who specializes in exhaust systems. In my experience an aftermarket Cat may last one year if it works at all. Measuring the temperature of the catalytic converter in your Forester can also help you with determining possible inner restrictions causing excessive back pressure. A sulfur or "rotten egg" smell indicates the formation of hydrogen sulfide (H 2 S), a likely sign of catalytic converter contamination. Hi, I would presume that they installed an original Subaru part and not an aftermarket part. The code is back now, P0420 again. Thanks for the feedback. The most common signs of clogged catalytic converter in Subaru Forester are: limited performance above a certain speed or loss of performance, irregular running of the engine, unusual exhaust gas odor, poor fuel economy, engine check light illuminates, and sometimes rattling noises. We purchased a used 2002 Outback wagon recently. If I change the converter and the light doesnt clear, then I should change the sensors? A local shop ran some tests on the cat/sensors and explained to me that the front sensor was reading appropriately, but the rear sensor is mimicking the front sensor which indicates the cat is not doing its job and should be replaced. Many converters on Subarus begin at a front Y-pipe that bolts to both sides of the engine. Its got 95,000 mi. Rant over. Low and behold recently Ive gotten the dreaded P0420. Over time, carbon deposits accumulate and clog up the catalytic converter, especially if the vehicle has racked up a lot of miles. On to the good news. May I ask something? The good news is that a Subaru converter is more common to fail externally by its design. Report a problem with your vehicle, tires, car seats or other equipment. Its been happening for about 3 years. Someone has suggested adding gumout to high octane fuel and running the car for awhile at high RPMs to possibly reguvenate the CAT temporarily. Poor acceleration But after reaching a certain speed, the performance of the engine will drop due to blockage of increasing exhaust gases in the system. Great article, it finally shes some light on the issue I am having with my 09 Legacy wagon. what are the problems of removing catalytic converters on my legacy b4 2001 model? Also, thanks for taking the time to help out fellow Subaru drivers. Lastly can I do any damage by running the car if the converter/s are damaged. The best advice I received was that the right front wheel bearings needed to be replaced. The catalytic converter is part of the exhaust system in Subaru Forester and its main purpose is to convert exhaust gases like carbon monoxide and hydrocarbons that are harmful to health and the environment into less harmful byproducts, like carbon dioxide and Subaru Catalytic Converter Location COIA Contents [ hide] Having said all that if you are being advised differently than that its possible the Catalytic converter is not coming close to light off and has failed completely, I am at a huge disadvantage with out data its really what is needed to diagnose the issue. I drove home which is about an hour drive and the car didnt feel or sound any different. If you notice higher than 3 psi (0.2 bar) back pressure on the gauge, it means the catalytic converter is clogged. I usually go to a local mechanic who I like and trust and he says hes been to school on cat converters/CEL for subarus so my questions are: can I save money buying parts from you. The car drives very well, there is no smell from the converter. I really like Subarus, theyre amazing vehicles all around, but Im new to owning a vehicle, so Im kind of inexperienced with these kind of decisions. Id like to get the issue diagnosed properly and was wondering what it would cost for the initial check by AWD Service? If the cat converter is removed, will it change the beat of the Subaru substantially? I find this hard to believe and too much of a coincidance that this occurred following our service. pollutants to less harmful substances such as carbon dioxide, water. Catalytic Converters are recyclable and just like any other recyclable material including engine oil and coolant is only hazardous if not handled properly. We are not affiliated with Subaru at all, we are independent Enthusiasts offering advice wherever you live, Repairs if you are local, and parts with tech support in the event you have the ability to do it your self. In my case, about a week before the code was tripped, I brought the car to my regular mechanic because we were smelling a fuel leak. Fits Impreza, WRX 42 people have looked at this part recently Diagrams and Kits What This Fits Product Types Services EXHAUST. Should I take it to the dealer or let my guy do it? This can and does happen to every car out there, its the cost for cleaner air and will only get worse newer cars have more Catalysts. shortly after I purchased c.e.l. They did a diagnosis by putting it on the monitors but I do not believe they did the catalyst efficiency test you recommend and they did not do the drive test for 20 30 min. It is important to verify catalytic converter lightoff prior to determining if a catalytic converter has failed. In any case, it is advisable for laypersons to visit a workshop. I only wish you were in New England instead of Seattle. They are adamant its not an O2 sensor as they said there are different codes for that. Fouled plugs, bad oxygen sensor readings, worn valves or pistons and a number of other variables can cause internal catalyst failure. The catalytic converter aids the conversion of these. But so will many other deficiencies in other systems. Air bags. Does this help determine if its the cat or something less expensive to fix. I would start with the higher octane fuel, some driving at higher RPMs at lower speeds and see if you can breath a little more life out of your Catalyst. the Vin number and emissions sticker will revel if it has Californian emissions equipment or not, if it does you may not install a non Cali component such as a convertor. Tightened cap againlight went off after three short trips. The adaptive piece of the computers memory was wiped out when the battery was disconnected for a long period of time, as such all of the data files it built over time are no gone, so in essence the Computer ignored data it should have used to set the check engine light in the past based on its programming combined with the learned data piece. Its been about 5 days now and I havent seen the light anymore. Yep, need to get that code read! They reprogrammed the ECM. The cel appeared a few days ago. Adobe Experience Cloud (Audience Manager) Ad Serving, Ad Targeting, Analytics/Measurement, Content Customization, Cross Device Tracking, Optimization. My mechanic thought perhaps the wiring on the O2 sensor was a little bit too close to the heated parts of the engine and tinkered it a bit by tying it away from the heat. throttle position, coolant temp, air flow in relation to one or another.). Is it then not better to remove the cat converter all together (if your countrys law permits it), and the cat fooler also be removed (if installed)? -engine is not doing its job. Justin has been providing Subaru Owners (regardless of where they live), with tips and advice about their Subaru since 2006. Its pretty commendable! Typically the Catalyst and 02 sensors should be done a the same time. Sometimes clearing the memory will cause the code to be set. nitrogen. The OBDII connector is usually located under the dashboard. Diagnosis by the local dealer P0420. Sorry I dont understand this question. Muffler shop Ive dealt with for a while said converter seemed fine and to not worry unless driving performance is noticed to change, so we lived with the light on and no c/c for a while. Ambient temp vs ECT temp at start up combined with drive time at certain speeds are what ultimately trigger the monitor, when we perform a drive cycle post code clear the catalyst and Evap monitors are the last two to come back online, and sometimes can take days or weeks. In the last 10 days the CEL and cruise have come on and off twice. Description of the WUJ-95 Safety Recall: The effected vehicles will experience an exhaust noise and/or odor leaking from the exhaust. Ive just bought a used 2009 Subaru Impreza 2.5i Thanks in advance for any advice you care to give. Buy an O.E. Great set of articles. These heat shields are susceptible to exposure and can break loose from connections and create annoying rattles while driving. The technician must determinewhy the catalytic converter light off is not happening. What I also noticed is now is that my temperature gauge is not working. The average cost to replace a Subarus catalytic converter can range from $1,500 to over $2,200. 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