It comes on about 100150 miles after driving the car. I have a p0420 code on my 2004 legacy, 35th anniversary edition code reader says catalyst efficiency below threshold, bank 1. I put 2 spark plug antifoulers on the rear mounted o2 sensor. Live demonstration of subaru forester and outback s 4x4 symmetrical all wheel drive system. Trouble code p0420 catalyst system efficiency below threshold bank 1. Trade up to a new subaru with more industryleading safety and technology features. P0420 catalytic converter efficiency below threshold merged thread. Every manual available online found by our community and shared for free. On some vehicles such as some subaru models an ecm reflash will fix the. View online or download subaru 2004 outback owner s manual. Fixing a subaru p0420 the cheap and nasty method youtube. I would very much value your input on what i should do with respect to the recommendations i am receiving.
Download your free pdf file of the 2004 subaru legacy on our comprehensive online database of automotive owners manuals. Code p0420 catalyst system efficiency below threshold often means you. The outback station wagon debuted in the united states market in 1994 for the 1995 model year. The front oxygen sensor before the catalytic converter is usually called. I keep getting the p0420 code for the emissions system below threshold. There are several reasons a p0420 will come up as an error and. How can i fix my catalyst system in my subaru 2004. I would also suggest reading in your owners manual what subaru states about not just the check engine light, but. So it has a special catalytic convertor and heads on it. You simply cleared the contamination and helped your cars catalyst system perform to required specs again.
Find out if you qualify for our free subaru roadside assistance. Please see the subaru navigation system owner s manual for more information on how to properly connect your smartphone devices bluetooth audio streaming capability. View online or download subaru 2004 outback owners manual. Service engine light often, this is the only symptom of the subaru outback p0420 code.
My 1994 turbo legacy passed the maryland state emissions test with no cats. P0420 dtc code catalyst system efficiency below threshold. Repair topics computers and sensors how to fix code p0420. I really like your website and it has provided a lot of information to me on the p0420 code on my 2000 subaru outback. I have replaced all 3 cats2 were damaged from the exhaust being banged around and you could hear the catalyst rattling. How to fix code p0420 ricks free auto repair advice ricks free. My smartphone device will not forward poi point of interest addresses within the aha application environment to my subaru navigation system. New subaru owners may qualify for a vehicle modification reimbursement. All years p0420 page 2 subaru forester owners forum. P0420 everything you need to know subaru or whatever you.
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