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Nissan Frontier 2005+



  • Even if you change the converters, you will not have fixed what caused them to go out. Check this out:

    Causes of Catalytic Converter Failure
    There are two ways a converter can fail:

    It can become clogged.
    It can become poisoned.
    There really is no "inspection port" for the consumer or mechanic to see an actual clog in a converter. Often, the only way to tell if a catalytic converter is malfunctioning (plugged) is to remove it and check the change in engine performance. When a clogged converter is suspected, some mechanics temporarily remove the O2 sensor from the exhaust pipe ahead of the catalytic converter and look for a change in performance.

    A catalytic converter relies on receiving the proper mix of exhaust gases at the proper temperature. Any additives or malfunctions that cause the mixture or the temperature of the exhaust gases to change reduce the effectiveness and life of the catalytic converter. Leaded gasoline and the over-use of certain fuel additives can shorten the life of a catalytic converter.

    A catalytic converter can also fail because of:

    Bad exhaust valves on the engine
    Fouled plugs causing unburned fuel to overheat the converter
    ­Sometimes you can tell that a converter is clogged because you don't go any faster when you push the gas pedal. Also, there usually is a noticeable drop in gas mileage associated with a clogged catalytic converter. A partially clogged converter often acts like an engine governor, limiting the actual RPMs to a fast idle. A totally clogged converter causes the engine to quit after a few minutes because of all the increased exhaust back pressure.

    The catalytic converter, like the rest of the emissions system, typically has a warranty length that exceeds the term of the warranty for the rest of a typical U.S. automobile.
  • Here is a better link for similar info:

    Your Catalytic Converter
    Should Never Have Failed.
    If It Did, Then You Have A Problem

    Just replacing the converter Will Not Fix The Problem


    If your catalytic converter needs replacing,
    one of the problems below most likely contibuted to its failure.


    Engine Tune-Up Required.
    A number of problems could occur to the catalytic converter as the result of an engine that is out of tune. Any time an engine is operating outside proper specifications, unnecessary wear and damage may be caused to the the catalytic converter as well as the engine itself. The damage is often the result of an incorrect air/fuel mixture, incorrect timing, or misfiring spark plugs. Any of these conditions could lead to a catalytic converter failure or worse.

    Excess Fuel Entering Exhaust.
    The fuel that powers your vehicle is meant to burn in the combustion chamber only. Any fuel that leaves the combustion chamber unburned will enter the exhaust system and light-off when it reaches the catalytic converter. This can super-heat the converter far above normal operating conditions and cause a Melt Down. Possible causes are an incorrect fuel mixture, incorrect timing, corroded spark plugs, a faulty oxygen sensor, sticking float, faulty fuel injector or a malfunctioning check valve.

    Oil or Antifreeze Entering Exhaust.
    Oil or Antifreeze entering the exhaust system can block the air passages by creating a heavy carbon soot that coats the ceramic catalyst. These heavy Carbon Deposits create two problems. First, the carbon deposits prevent the catalytic converter from reducing harmful emission in the exhaust flow. And second, the carbon deposits clog the pores in the ceramic catalyst and block exhaust flow, increasing backpressure and causing heat and exhaust to back up into the engine compartment. Your engine may actually draw burnt exhaust gasses back into the combustion chamber and dilute the efficiency of the next burn cycle. The result is a loss of power and overheated engine components. Possible causes are worn piston rings, faulty valve seals, failed gaskets or warped engine components.

    Deteriorated Spark Plug
    or Spark Plug Wires.
    Spark plugs that don't fire or misfire cause unburned fuel to enter the exhaust system. The unburned fuel ignites inside the converter and could result in a partial or complete melt down of the ceramic catalyst. Spark plugs and spark plug wires should be checked regularly and replaced if damaged or if wires are worn or cracked.

    Oxygen Sensor
    Not Functioning Properly.
    An oxygen sensor failure can lead to incorrect readings of exhaust gasses. The faulty sensor can cause a too rich or too lean condition. Too rich and the catalyst can melt down. Too lean and the converter is unable to convert the hydrocarbons into safe elements and may not pass a state inspection.

    Road Damage or Broken Hangers.
    The ceramic catalyst inside a catalytic converter is made from a lightweight, thin-walled, fragile material. It is protected by a dense, insulating mat. This mat holds the catalyst in place and provides moderate protection against damage. However, rock or road debris s triking the converter or improper or broken exhaust system support can cause a Catalyst Fracture. Once the ceramic catalyst is fractured, the broken pieces become loose and rattle around and break up into smaller pieces. Flow is interrupted and backpressure in the exhaust system increases. This leads to heat build up and loss of power. Possible causes of a catalyst fracture are road debris striking the converter, loose or broken hangers, potholes or off-road driving.

    After You Install
    A New Catalytic Converter,

    If your car caused the OEM catalytic converter to fail,
    it could cause The New Converter To Fail as well. And the warranty that comes with a new replacement catalytic converter does not cover the type of damage listed above.
  • 604doc604doc Posts: 182
    Just for the fun of it, I checked for catalytic converters for Frontiers. They show 3. (Not knowing your year, I punched in 2007)

    They do say they are not legal for use in the Republik of Kalifornia, so if you live there, it looks like you're out of luck.

    Sorry to hear about your problems.
  • When I bought my 2006 Frontier the salesman showed me a routine to go through to diagnose the vehicle. I have looked and looked in the owner's manual and can't find it. Anyone out there know how to do it?
  • We recently bought a '12 LWB SL crew with the 4.0 V6 and are thinking of selling our class C motorhome and buying a trailer in the 3500-4100 dry weight range. Loaded we would come pretty close to the 6000 LB rating. My questions are:

    -What kind of MPG have you experienced? in what region, road and terrain?
    -What are you pulling?
    -What hitch equipment?
    -Any transmission or brake issues?

    In our class C we're happy when we get over 8mpg towing our Matrix, if the Fronty would be in the single digits, we'll probably stick with our current setup. Thanks for your help!
  • steelydansteelydan Posts: 133
    I have a 2011 4L V6 CC, I have not attempted to pull anything near 6,000 lb, but I have read a lot of posts on other Frontier forums about towing. Also, your owner's manual has a whole chapter on towing. With 6,000 lbs, you would need a Cl IV hitch, and I would get some advice from your RV dealer as to weight distribution, what kind of trailer brakes used, etc, before buying the hitch. I would stick with the Nissan wiring harness, aftermarket types can void your warranty if something goes wrong. I bought a Cl III hitch (5,000 lbs) from a Master Hitch dealer , the Hidden Hitch fits neatly under the rear bumper and looks professsional.

    I will only comment on one other thing: MPG is not going to be great. I know I recently read on another Frontier forum that a new RV trailer owner (22ft) averaged 10 mpg on his first trip home with his trailer. Even if you drove like an old man, I can't imagine your mpg would ever crawl above 12-13 mpg over a whole trip, given 6,000 lbs. I wish the Frontier had a diesel !

    Nothing really wrong with Edmunds, but there are better(busier) Nissan Frontier owner forums out there. Do a Google search and you will find them !

    Just my .02 !

    Take care,
  • Thanks Steelydan, I'll check it out
  • I'm currently having problems with my transmission working correctly in overdrive. I have to shut the overdrive off in order to stop vibrating at 35 to 40 miles per hour. How did you get Nissan to replace your transmission. I have 87000 miles on my 2005 crew cab 4x4.
  • My 2007 Frontier has the same problem. I just had the radiator replaced and transmission fluid looked like chocolate milk. They flushed it and put in new transmission fluid. It still has problem of rumbling but not as bad. Does anyone know how to lodge a complaint so that Nissan must do a recall?
  • First, Nissan extended my warrantee to cover this situation. Not long ago I got an offer in the mail for reimbursement if I had had to pay for replacement.

    Here is the name of the Class Action Co-Counsel

    Gary Graifman
    Kantrowitz, Goldhamer & Graifman
    747 Chestnut Ridge Rd.
    Chestnut Ridge, NY 10977

    The letter indicated I have till 6/7/13 to file. I hope this helps. I haven't had this problem with my Frontier.
  • lwebblwebb Posts: 1

    My 2005 Frontier just started doing this at 35 to 60. I checked the transmission fluid and it looks like chocolate milk. Nissan just quote me a price of $6600 to fix my transmission and radiator. I have about 105,000 miles on it. I also need to replace catalytic converters which was quoted at $1300. This is incredible.

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