Question about 2004 Nissan Altima

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DOES THE 2004 ALTIMA HAVE PROBLEM WITH CATALYTIC CONVERTER

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  • Nissan Master
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Yes it does.

Posted on Jul 10, 2010

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Catalytic converter is missing. The only thing in the housing is a metal ring. There are no signs of theft.


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My car wont go faster than 20 mph, and wont go above 2000 rpms, Why?


Hi Daniel there is an engine management fault that has put the car in whats known as (Limp Home Mode) you will need to get it diagnosed to find out exactly. Regards Jim...

May 17, 2015 | 2004 Nissan Altima

1 Answer

2005 Nissan Altima service engine light came on, Had a reading = P0420, #1 aa1 Large vacumm leak, #2 aa2 Fuel system fault, #3 aa3 Ignition system fault and #4 aa4 Failed Bank 1 catalytic converter. Any...


one thing you can bet the house on ....if a nissan sets a cat converter code...it needs a cat converter...trust me on this.in the last 10 yrs. as nissan master tech i have seen no other cause!

Mar 18, 2011 | 2005 Nissan Altima

1 Answer

Is there a diagram anywhere online for a 1993 Nissan Altima that shows where the catalytic converter is and how it connects to the exhaust system?


The catalytic converter is located appx. underneath the front passenger's seat, on the exhaust pipe. It's smaller than the muffler and squarish in shape. It bolted onto the exhaust pipe. There is only one exhaust pipe on that car and also only one catalytic converter.

Feb 05, 2011 | 1993 Nissan Altima

1 Answer

I recently had my altima serviced by the dealer. They replaced the catalytic converter as well as the oxygen sensor, which cost me $1000.00. Approx. 4 days later , while driving on the highway, my check...


Pray.
Just kidding. Take it back to the dealership and demand that they find out what the check engine light is for. They may have just put the catalytic converter on wrong.

Oct 03, 2010 | 2003 Nissan Altima

2 Answers

What is an code po300 and po420 and what do i need to do i have an 2002 nissan altima


The p0300 code is a random missfire code sometimes caused by bad spark plugs and wires, if you have not done a tune up, it's time for one. now, the p0420 code is for catalyst efficiency below threshold, basically, your catalytic converter is bad and may need to be replaced. Sometimes repairing the random missfire can eventually clear the p0420 code. your car is not burning fuel properly, therefore the catalytic converter is getting dirty. Also, if you notice blue smoke coming out the tail pipe, then that's the cause for a failing catalytic converter as oil is getting to the combustion chamber and being burned off through the exhaust.

Mar 09, 2010 | 2002 Nissan Altima

1 Answer

My car got a po420 code reading when i went to get it inspected. whats that mean


The PO420 means that the Catalyst System has an Issue'

The actual error is

"Catalyst system below Threshold (bank 1)"

As mentioned above, the code's description is Catalyst System Efficiency Below Threshold (Bank 1). OK, now tell me that again in plain English please.... let's break it down: the catalyst system being referred to is your three-way catalytic converter; so the catalytic converter is not working properly (i.e. it's not efficient). Bank 1 refers to the side of the engine which contains cylinder #1. On inline engines such as 4 & 5 cylinder engines, there is only one bank. So, to really simply things let's just say that the efficiency of the catalytic converter and/or exhaust pipe and/or O2 sensor is not so great.

There are a number of things that could be causing this p0420 catalyst efficiency code. The most common thing is the catalytic converter itself is no longer functioning properly. The other likely thing is the rear O2 (oxygen) sensor is no longer working properly. Other things could include exhaust leaks, damaged exhaust pipes, damaged O2 sensor wiring/connectors, plugged catalytic converter, etc.

You can search for the Information on the web. Just type in the actual error above into you fav search engine!

Hope that helps...

Dec 28, 2009 | 2004 Nissan Altima

3 Answers

Receiving engine code p0420 on my 2005 altima 2.5 s


A p0420 code indicates a Catalytic System efficiency failure, Bank 1.
Basically, the computer is seeing reduced efficiency of the catalytic converter or one of it's components (such as an 02 sensor)

There may be a few root causes, such as a faulty oxygen sensor, faulty coolant temperature sensor, faulty converter, Large exhaust leak, or retarded (slow) timing.

Nov 30, 2009 | 2005 Nissan Altima

2 Answers

Poor fuel mileage with my 02 nissan altima


yes it very possible because the catalytic converter is part of the emissions and you need to ask yourself when was the last time you had a good tuneup drive belt,sparks and wires if needed and a fuel filter and a pvc valve.

Feb 08, 2009 | 2005 Nissan Altima

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