Question about 2001 Nissan Altima

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The engine is using/burning an unusual amount of oil and somehow is affecting the catalytic converter.The mechanic says even if we replace the converter to pass emissions test that in another year or so, it will happen again.He says some 2001 Altimas just have this problem.Have you heard of this and is there any solution?

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Sounds like the piston rings are gone you may need to over haul your engine the oil it is burning is plugging up the converter

Posted on Jul 29, 2009


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My Service engine like is on the troubleshooting code is p0420, and my truck throttles down then revs back up win in park. Whats my problem

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2002 Nissan Altima consumes oil. I've replaced (approx 1 yr ago) the catalytic converters (new) and used engine; however, still consuming oil (1-2 quarts every other week). Check engine light on again with...

The used engine that you bought was previously damaged by the disintegrating cats that were on the car that it came from and because it was burning oil badly when you installed the new cats, it ruined the new cats with the oil that was coming out of it. You'll need a re-manufactured engine, not a used one, they are all bad, and new cats again. Bad news I know. but likely the problem.

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The engine light in my car came on about 2 and a half weeks ago. I brought it to the mechanic for a diagnostic test and they said that my catalytic converter needs to be replaced. My engine has been...

Your car does in fact need a new catalytic converter. And it should also not burn a drop of oil. It can burn oil as it seeps past leaking intake valves and piston rings.

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Dec 03, 2010 | 2002 Nissan Sentra

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Does anyone know what catalytic converter oil is? Right on top of my engine there is a lid that says that on it, and I looked in it and it's bone dry...

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07 charger with a 3.5 motor 63000 miles uses 1-2 quaters oil

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Engine is using 1/2 qt of oil every 800mi, 1.8T '04 Cabriolet

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A fully synthetic motor oil, Mobil 1 0W-40 with SuperSyn Technology exceeds industry standards and the major leading builder requirements, enabling the product to keep performing well after conventional oils cannot. Mobil 1 is recommended by leading car manufacturers as initial fill

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1997 lincoln town car 4.6 with a p0430 fault code

I will make an assumption here, we know what the root word means. This code was extracted from the computer by? What this is telling you one of 2 things: The Bank 2 oxygen sensor down stream of the catalytic converter (there are 2 converters, one for each bank of cylinders on the 4.6ltr engine) is bad and/or that the Bank 2 catalytic converter is no longer doing the job it was designed to do. Simply, Catalysts wear out. They are good for approx 100,000 miles (as required by Federal Law). Again, I assume that the reason the intake manifold was replaced was because it had a crack in one, or more, of the runners? (part that feeds the head of a manifold). It may have taken a while to find this as being the cause of why the car running incorrectly, maybe rough. This means, that during the time the car was being driven with the problem, the amount of unburned, or not within spec exhaust gases, coming off the side of the engine affected by the intake issue was higher than normal. This out of balance level of exhaust gases were being dumped into the converter on that side of the engine, thus causing the converter to have to run hotter, work harder, or even at the time the gas was being processed through, causing deposits to be formed in the converter, thus shortening it's life span. The Bank 1 side of the engine, apparently, did not have the issue and it's catalytic converter's life was not affected. I hope this makes sense to you.

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1 Answer

Engine using oil. No sign of leaking. Catalytic converter replaced 13 months ago, now needs replaced. Told need new engine. What is causing the catalylic converter to plug?

Was a leak down test performed on the motor?This will determine if the oil loss is due to bad rings or a head gasket.A head gasket can be repaired,rings will require an overhaul or new motor.Have checked the coolant for oil contamination?

May 31, 2009 | 2002 Nissan Altima

1 Answer

2002 Altima engine/Catalytic converter problems

check engine light has nothing to do with oil level. Only the red engine light does. It sounds like you are burning a lot of oil and it is poisoning your catalytic converter. Your converter is killing itself trying to treat all the unburned oil that is coming to it. It will get so hot that it swells inside and clogs it up. Why you are burning oil is the question. Only 3 possibilities. Past the piston rings, past the valve stem seals or a plugged pvc valve and its hoses. Clean the PVC hose and change the PCV first. Changing the cats now will just kill them again until you fix the oil burning.
Autozone will do free scan test for fault codes by the way.
PCV won't show up there though.
You can buy cheap engine on ebay or at page with asterisk is lowest price.

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2 Answers

1 - service engine light flashing. 2 - loss of power. 3 - catalystic converter got red hot and plugged. 4 - had plugs , wires and tune-up done. the mechanic told me that the engine is still missfiring and...

Somehow raw gas vapor is exiting one or more cylinders and being burned inside your catalytic converter. You'll ruin another expensive converter if you replace that before the problem is solved.

Has your mechanic checked the engine timing?

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