They also list a Y pipie and other exhaust pieces most from Stainless Steel and reasonable (cheap by Subaru standards ) eBay Motors: Subaru Legacy / Outback / Impreza catalytic converter (item 190275009482 end time Feb-16-09 12:01:44 PST)Back to your P0420. I'd guess it was caused by the break in the exhaust pipe allowing oxygen to reach the rear O2 sensor. Bottom line, not the CAT or the rear O2 sensor fault. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester.Forester 2001 L - Stock 101k Miles P0420 - Catalytic Converter Efficiency Below Threshold The forester has been throwing this code for a few months now, typically shows up on long highway runs (but to be fair, that is the vast majority of my driving). ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru ...The P0420 code can actually point to a lot of different things. In a rush to head out of town, I got an oil change at a subpar quick lube place, and got a P0420 code about 100 miles down the road. Took it over to a buddy's place when we got back into town, and he said "this cheap oil filter is probably throwing the code".#p0420 #p0430 #catalyticconvertercodes #badcat #autel #motoragetrainingThe "Catalytic Converter Efficiency" codes, P0420 and P0430, are among the top 10 DTCs...Used 2020 Subaru Forester Pricing. Used 2020 Subaru Forester pricing starts at $18,335 for the Forester Sport Utility 4D, which had a starting MSRP of $25,505 when new. The range-topping 2020 ...Just under three hours from San Francisco, 730 acres of redwood forest will open to the public for the very first time as the Harold Richardson Redwoods Reserve in 2021. Just under...Like the title says I have been trying to nail down the cause of a P0420 code for 5 years now. I have tried everything I could find on the forums. Sometimes the code disappears and then it comes right back. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability ...P0420 is a major money maker for Subaru mechanics... When the rear O2 sensor measurements are our of the very narrow acceptable values, it will throw the P0420 code. That could be because the engine is running too rich (which in turn could be caused by several factors, incl MAF sensor, throttle body issues, Front O2 sensor giving wrong …MY06 Forester Shifting Problems, P0420. 5575 Views 10 Replies 4 Participants Last post by greenlakejohnny, Jan 31, 2013 Jump to LatestSafe to Drive with P0420 code? Long story short, I had a milltek turboback system with 100 cell cat fitted on Friday and I was out and about today and pulled out of a corner in 3rd, changed down to 2nd and put my foot down. As soon as I did that the CEL light and traction control light came on with the cruise control light on, still ran fine ect.P0420 is VERY RARELY a failing cat. It is most commonly a failing oxygen sensor (front Subaru, rear any brand), vacuum leak, exhaust leak or what not. Search that code on the forums and you'll find plenty of info. Cats rarely fail without serious mechanical problems, I think your mechanic wants to give you an expensive repair bill.2.5x_sleeper. 45859 posts · Joined 2007. #2 · Apr 13, 2021. @DirtyJack You can't just unplug the sensor, you will get a CEL code. Luckily, on the '04 the rear O2 sensor is only used to monitor the efficiency of the CAT (s). There's a couple ways to fool the system. The $5 fix inserted into the exhaust with the end sealed.HELSINKI, Sept. 16, 2020 /PRNewswire/ -- PONSSE Opti 8 is a state-of-the-art touchscreen computer designed for PONSSE forest machines. User-friend... HELSINKI, Sept. 16, 2020 /PRNe...Dec 6, 2021 · Catalytic-System Clean. Protects the catalytic converter from clogging with soot. Cleans the injection system and the combustion chamber. The combustion improver works directly, which leads to an immediate, measurable reduction of the pollutants. Clean engines use less fuel and emit less CO2.That is the issue with the P0420. Resident Adviser @ WTF Tuning, LLC 2002 FORESTER S 1998 FORESTER S. Save Share. Like. scarmack. ... Subaru WRX Forum. 3.2M posts 153.2K members Since 2001 We invite you to join our Subaru Impreza WRX and STi community to discuss engine mods, builds, detailing, and more. ...Mar 25, 2010 · One of my favorite threads for this is the $5 fix :wink: When you get the P0420 CEL code, the cause can be: A faulty or failing front O2 sensor (if your gas mileage has dropped off with hesitation, backfires & an overly sooty exhaust tip). An exhaust air leak ahead of the rear O2 sensor (rusted or cracked pipe). A failed CAT.Options: 1) replace magnaflow with Subaru cat, and receive $500 credit, 2) swap 2002 computer out with a 2001 Outback, since its really the computer that is having the problem, or 3) keep trying different additives. ... 2003 forester x- I have had P0420 code since June(ish) 2019. No other codes except the occasional fan rationality check code ...3. Subaru & Honda. If you find a P0420 code in your Subaru or Honda, it’s most likely the catalytic converter to blame. It can also be caused by an exhaust leak or a bad oxygen sensor. Check for vacuum leaks or other fuel mixture-related engine codes. Check for any exhaust leaks before the catalytic converter.That P0420 code! This is a perfect example of why the dreaded P0420 code has to be verified by checking the O2 sensors and converters separately. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester. Show Less . Full Forum Listing ...Here's my situation. I am throwing a p0420, after long drives, but now after about 7 months, it throws often. ... 1999-2005 Subaru Forester Catalytic Converter - EvanFischer REPS960301 - Single, Powdercoated silver, 49-state legal - no CA shipments, OE replacementP0420 Diagnosis Sleeper vdc. Save Share. Like. ... Welcome to the Subaru Outback Owners Forum, we have tons of information about your Subaru Outback, from a Subaru Outback Wiki to customer reviews. Show Less . Full Forum Listing. Explore Our Forums. Gen 5: 2015-2019 Problems & DIY Maintenance Gen 4: 2010-2014 Gen 6: 2020-present Gen 3: 2005-2009.Hey everyone!So the Subaru WRX decided to give me a check engine light (CEL). Which gave me a heart attack because it's a Subaru. The CEL codes (P0420, P013...2010 Subaru Forester p0420 . I have an intermittent p0420 code on my 2010 Subaru Forester non turbo with 150,000 miles. I have the freeze frame data but not sure if it points to anything looking for advice what might be causing it hoping not the cat this early. Freeze frame data: Code p0420 Fuelsys1 CL Fuelsys2 N/A Load percent 55.3% Etc ...Out of the 3 tubes ive remove the outside two and left the middle one on since i believe that from the gas tank. No luck there pumps will still shut off. I also have a check engine light come on with codes P0457 and P0442. Ive searched around and people have replaced the canister and whatever other components are linked to the canister and some ...Nov 3, 2013 · P0420 code, running rich My car, 1999 Forester was giving me fits, running well most of the time, but it started setting the dreaded P0420 code and I noticed that it was running rich, gas mileage dropped to 17 where it usually gets 29 to 31 mpg highway. Also, the idle was wild at times, either idling at 1800, or bouncing between 500 and 1000 rpm.If it's not there, drive the car down the street for a few minutes, or until the light comes on and check the fault in the VDCCM. If it's C0057 again, replace the VDCCM/ABS module. If you're in Austin, TX and having difficulties with the dealer or any shop, hit me up. P0420 Diagnosis. Sleeper vdc.Paid $90 for useless test. I bought front sensor off Amazon for less than $100. Installed sensor, reset code. On the second highway trip the cel trips code 0420. I rerun subaru test procedure. Results show sensors fine, bad cat. I replace the rear sensor so that when I take the car back to Subaru they should have no option but to replace the …Bulletin No: SB-11-124-12. Date of Bulletin: 01/31/2013. Summary Description: SUBARU: INFORMATION PROVIDED REGARDING REPAIR AND INSPECTION OF CAMSHAFT POSITION ISSUES AND ALSO, CHECK ENGINE LIGHT COMING ON, EXTENDED CRANKING OR NO START, ROUGH IDLE. CONDITIONS MAY BE CAUSED BY CAMSHAFT POSITION SENSOR OUT OF SPECIF.2006 - CEL DTC P0420 and P0457 with metallic rattling/grinding/scraping. ('06-'08) Tags metal grinding at low rpm p0420 p0457. ... but I wanted to share my experience with buying the 2006 Subaru forester x 2.5i; upon further inspection, the heads are weeping, seems to be an exterior leak, so there is a little bit of positivity there, but who ...P0172 is running too rich. C1422/C1424 seemed related to O2 sensor. Minor things you can do to help overfueling (there's tutorials out there for all of this, google is your friend): Clean AFM. Clean EGR. Clean throttlebody. Clean PCV. Replace oil (sometimes oil gets contaminated with fuel apparently from lots of short drives, and causes issues ...The cat issue can be dealt with later. If a vehicle is throwing a P0420 only, it should still run well, or at least can be made to run well. 2005 FX 2006 FXT 2012 FXT. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester.Jan 29, 2024 · The P0420 code is a common diagnostic trouble code that indicates an issue with the catalytic converter in a Subaru Forester. This code is significant as it can affect the vehicle’s emissions and overall performance. In detail: The P0420 code specifically points to a problem with the efficiency of the catalytic converter.P0172 is running too rich. C1422/C1424 seemed related to O2 sensor. Minor things you can do to help overfueling (there's tutorials out there for all of this, google is your friend): Clean AFM. Clean EGR. Clean throttlebody. Clean PCV. Replace oil (sometimes oil gets contaminated with fuel apparently from lots of short drives, and causes issues ...Recently the check engine light has come on and is showing the P0420 code. I've been reading older posts on the board and, from what I gather, they say the …I'm very new to these Forester hells having just gotten a 2010 and recently got the dreaded P0420 code. In Youtubes suggesting several possible solutions the catalytic converter cleaner added to 1/4 full fuel tank was the first suggestion. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester ...Subaru of America, Inc. (SOA) has determined that vehicles affected by this Service Program require ECM reprogramming. ... performed with over 100,000 miles and the Check Engine light illuminated with DTC P0420 in the ECM memory. The catalytic converter efficiency test must also indicate replacement is necessary. For all other vehicles, the ...Subaru Emissions Performance Warranty (36-month / 60,000-km) Subaru Canada, Inc. guarantees that every Subaru vehicle is designed and manufactured to pass all federal and provincial emissions performance tests and will continue to do so for a period of 36 months from the date of initial registration or 60,000 km, whichever comes first.That has fixed the P0420 code for me multiple times on several different Subies. It's a small investment compared to replacing the entire cat. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester.2002 Subaru Forester S P0420 Own a 2002 Forester S (purchased late 2001), 127,000+ miles, mostly city driving the past 6 years or so. Would like to keep the car for my teenage son, who will start driving this summer. Have always used mid-grade gas in the car, and am religious about oil changes, etc.It usually gets you closer than a magic eight ball would. The short version of this is that P0026 is never due to a loose gas cap, 'bad' gas, vacuum leak, etc, unfortunately. It could be low oil, inappropriate oil viscosity, irregular maintenance, sensors, solenoids, wiring, possibly heads, etc. Like.HELP: Code P0420. My 2009 forester has the “cruise” light blinking and a solid traction control off and check engine light. I got the diagnostics ran and it came out with “P0420: catalyst system efficiency below threshold bank 1”. This happened to me last year but ignored the symptoms for about a month and then had to get it taken in ...The P0420 CEL code comes from the rear O2 sensor which monitors the efficiency of the CAT. That means the rear O2 sensor is detecting too much O2 in the exhaust flow. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester. Full Forum ...When it comes to choosing the perfect SUV, Subaru has long been a trusted brand. With their commitment to safety, reliability, and versatility, it’s no wonder that the Subaru Outba...03 Forester X 154,000 Miles. Bought in October 2020 About a month ago I got a CEL it turned out to be the P0420 code. No loss of performance. Since then I changed spark plugs and did the $ 5 fix, but still get the code when I drive on the highway. I assume both O2 are the original ones. No exhaust leaks that I can detect.Update: more of the same like the last post. I get a pending P0420 here and there but there are enough good drive cycles that it doesn't pop a CEL. ... We’re the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester.The P0420 CEL code comes from the rear O2 sensor which monitors the efficiency of the CAT. That means the rear O2 sensor is detecting too much O2 in the exhaust flow. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester. Full Forum ...2007 - O2 converter (P0420) / head gasket leak? Hi my high mileage (443K km) Forester has been throwing a check engine code for a while now. Got it read and it was P0420 - Catalyst System Efficiency below Threshold, Bank 1. My mechanic just called and 1) noted the head gasket leak is much worse than previous); 2) cylinder 3 is misfiring; and 3 ...Subaru Service Bulletins are intended for use by professional technicians ONLY. They ... 2017-18MY Forester 2.5L 2019-23MY Forester 2017-23MY WRX 2019-21MY Ascent SUBJECT:DTC P0420 Diagnostic Procedure INTRODUCTION: This Service Information Bulletin announces diagnostic service procedures to be followed when DTC P0420 (Catalyst System ...45853 posts · Joined 2007. #7 · Sep 2, 2022. @SueBrew on your 2001, the rear, downstream O2 sensor function is to monitor the efficiency of the CAT. It's not used by the ECM for engine management, just to give you a P0420 CEL code if too much O2 is detected in the exhaust flow.. Your only issue is that P0420 CEL code, no other CEL codes.Next day, CELs out the wazoo. All O2 sensor and cat-related (P0420, P015A, P015B). It was the weekend, so I didn't go straight to the dealership, and then they went away after 5 cycles or so. Well, they're back, and it's now been 8 cycles with the codes still showing and the engine "stuttering" even worse than before.After reading most if not all of Cardoc's 1000+ page bible on the P0420 codes, and doing much of the testing (as best I could), I thought I'd ask for a bit of advise. ... 2009 Forester 2008 Outback 2.5i 130K PIA, 2010 Outback 2.5 103K, 139K, 156K, 192K ... I guess first / next step is to get an O2 sensor and a real live Subaru AF sensor. That ...Normally, P0420 could just be the catalytic converter, or the rear O2 sensor. At this mileage, it wouldn't be that of a surprise. The code is fairly well known in the Subaru community, if you search in the Forester or NASIOC forums. It's normal for it to trigger a Christmas tree of warning lights, including emission, and (go figure) disabling ...How To Address a Subaru P0420 (Step by Step) NSUGS. 162 subscribers. Subscribed. 260. 16K views 1 year ago. The nerdy and keen eyed will notice I omitted …Hello everyone! Received this p0028 code on my 08 ll bean forester last weekend when going up to the mountain. Didn't notice any issue running until I had to climb a pretty steep hill and rpms went over 4K. The car was physically shaking back and forth like it was going to stall until I took my foot off the gas a bit and brought rpms down.Forester 2001 L - Stock 101k Miles P0420 - Catalytic Converter Efficiency Below Threshold The forester has been throwing this code for a few months now, typically shows up on long highway runs (but to be fair, that is the vast majority of my driving). I bought a scanner from scantool.net... www.subaruforester.org.Sep 11, 2019 · J. Jdave Discussion starter. 7 posts · Joined 2017. #11 · Sep 11, 2019. A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for (unlikely) A damaged or failed oxygen / O2 sensor Downstream oxygen sensor (HO2S) wiring damaged or connected improperly.Twice on one Subaru (Outback 3.6R) and once on another (Impreza) the P0420 code has been cured by replacing the downstream O2 sensor. Neither vehicle was experiencing a power loss ... We’re the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru ...Running overly rich can cause a P0420 CEL code. We haven't seen that CEL code since the 5$ fix was installed. :biggrin: The normal installation is to drill out (1/2") one spacer... has to be done so the O2 sensor tip will fit. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications ...DID NOT WORK. I have an 02 Forester with 181,000 miles. P0420 code came up so I know the cat is under performing. I don't know about people who say the $5 fix works. It didn't work for me. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru ...Hi guys.. I too have the same code P0420 on my ‘01 Forester L, 120K miles. ... We’re the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester. Show Less . Full Forum Listing.The two codes may actually be unrelated. The P0420 is "cat below threshold efficiency". It could mean a bad rear 02 sensor, bad front 02 sensor or bad cat. At dealer pricing, that's $100, $150 and $1000 respectively, just for the parts. P0420 issues will not normally result in rough idle or rough running, unless it really is the front O2 sensor.The P0420 code usually came back with 1 to 2 years in the reviews. I rolled the dice on a middle of the road unit, ... We’re the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester.I have a 2007 subaru outback. 203k miles. Timing belt was changed in dec 2013. since April we have had issues with the oil. ... Outback, Forester, Baja, WRX&WrxSTI, SVX ; P0420 code and issue with oil P0420 code and issue with oil. P0420 P0028; P0026; oil; By amtrack, July 19, 2014 in 1990 to Present Legacy, Impreza, Outback, Forester, Baja ...P0420 is a diabolical code that IMO is best viewed with suspicion. ... We’re the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the …2002 subaru forester with a p0420 code. bank 1. what needs to be done? Unfortunately, the P0420 is a fairly straight forward code, and a fairly common problem. This code points to a failing Catalytic Converter. The Oxygen Sensors measure the amount of emissions in the exhaust going into, and then out of the converter.I also have the p0420 code and sometimes if my ignition turned to the acc mode the rear sensor makes a buzzing sound, I can get under the car n wiggle the wire and the buzzing stops. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester ...Catalytic-System Clean. Protects the catalytic converter from clogging with soot. Cleans the injection system and the combustion chamber. The combustion improver works directly, which leads to an immediate, measurable reduction of the pollutants. Clean engines use less fuel and emit less CO2.Technical Forums and Vehicle Assistance. Engine and Exhaust. EJ25 - 2.5L Non-Turbo (1998-2010)Right after I got the new PAK file, my car threw a P0420 code. Took it back into the dealership and they confirmed the data stream showed the CAT's were under performing. ... We're the best Subaru Forester Owners Forum to talk about the best years of the Subaru Forester, modifications and reliability history of the Subaru Forester. Show Less ...It’s a 2012 forester premium. In the last year she had the engine gaskets replaced. Then the catalytic converter, the alternator, radiator and battery. So she was over it and gave it to me. I had to drive it from Louisville to Wisconsin. And a couple hours in the check engine, traction control light (both solid) and cruise control light ...Subaru Forester 2014 I have a cel with code p0420 on and off,CEL came up drove for 70KMS and it went off the moment I had filled in gas. It comes on and off. Should I take it to mechanic or keep drivingIn all seriousness, the P0420 is only good for making your wallet lighter by either ~$100 for a new sensor or several times that for a new cat. I've never seen a P0420 actually point to a bad catalytic converter. As far as how an O2 sensor works, I'm not entirely sure. There are a bunch of different types using 1, 3 or 4 wires.Feb 20, 2015 · The P0420 code is for low cat efficiency. It is unrelated to the cruise control, although the cruise light will blink (and the cruise control is disabled) on any CEL. I would say it was simply an odd coincidence (unless your car is possessed by an evil spirit). KianLM said: I also developed a head gasket leak.48 posts · Joined 2009. #1 · Apr 19, 2009. P0420: Catalyst efficiency below threshold (bank 1) P0171: System too lean (Bank 1) P0171 Pb: system too lean (bank 1) These are the codes i pulled today, and what do they mean. 2004 WRX with 50,781 miles, perrin short ram intake and axle back exhaust.Nov 30, 2018 · The most common fix for P0420 in the Subaru Forester is a new catalytic converter, followed by an O2 sensor replacement. Before taking your Forester into an exhaust shop for an (expensive) new catalytic converter, let’s ensure that’s what you need. Here’s a good P0420 diagnostic order for the Subaru Forester: 1. Check for Other Codes.. That is, if someone shows up at a Subaru dealerThe CEL would turn on and off occasionally so I changed the B. bdubbs84 Discussion starter. 13 posts · Joined 2008. #7 · Oct 20, 2008 (Edited) Well, I got rid of the P0420 catalyst code, but now I have two new codes. One is P0440 (Evap. Emission Control System Malfunction) and the other is P0136 (O2 Sensor Circuit Malfunction, Bank 1 Sensor 2). I already have the O2 sensor spacer in place. The P2097 code indicates that the post-ca He has many many used foresters for sale and probably has a rebuilt engine ready to go or he can do yours. He is comparably cheap. Ph-717-426-4142. Tell him Al Conrad sent you. The other guy is every bit as good but a bit more expensive and probably doesn't have a rebuilt. He is Subaguru 717-786-2304. I have a 2006 Subaru Forester with 95,000 miles on it. E...
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