2005 nissan altima service light on oem code p0420

SOURCE: 2005 Nissan Altima

HEY WHATS UP BRO this is what you have to do i just got brand new headlight replacements for my 05 nissan altima and it looks great by the way if you replace one you should just do both becasue it will look weird. anyways i have an hid kit as well but so. what you have to do is remove the bumper take all the plastic screw things off the top and on the botton underneith the bumber then you remove 2 screws on each side of the bumper they are located kinda in the dender well then you unscrew those then you can pretty much pull the bumper off there are 4 screws holding on each headlight 2 on top one on the side and one on the bottom front in order to remove the headlight you have to take off the bumper. hope this helps oh ya and buy buy the way you should get an hid kit the bulbe size for the altima is an h1 bulb and you need to get the single beam buld. get it at xenoneyes.com and the the 6000k. The 6000k look the best and is the brightest trust me you wont be let down they are brighter and last longer than the standard halogen bulb um also and like 5 times brighter. they are 129$ at xenoneyes.com thats the cheapest price that i have seen and they are a great value and good quality just dont touch the bulb. oh ya if you replace one headlight do both it looks much better. maybe try this web site to show you a little bit of how to do it
http://images.google.com/imgres?imgurl=http://thaibruin.netfirms.com/ALTIMA/HID5.jpg&imgrefurl=http://www.nissanclub.com/forums/f-q-2002-2005/65970-how-installing-h-i-d.html&h=600&w=800&sz=60&hl=en&start=17&um=1&usg=__9gLitht8i7ud-QSgy-x_rCBvSWM=&tbnid=TUGSVoemsGTp1M:&tbnh=107&tbnw=143&prev=/images%3Fq%3D02%2Bnissan%2Baltima%2Bhid%2Binstall%26um%3D1%26hl%3Den%26safe%3Dactive%26rlz%3D1T4GGIH_enUS216US216
hope this helps my email is [email protected] let me know how it comes out

Marvin

• 85242 Answers
• Posted on Nov 18, 2008

SOURCE: IAT Sensor Location on a 2005 Nissan Altima

It is small and round (2 wire connector) and located either in the flexiable air intake hose to the engine or in the engine air filter housing.

SOURCE: 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.

SOURCE: How do I change brake light bulb on 2005 Nissan Altima

The first objective is to figure out which bulb you need. I had to replace the bulb for the largest light which was a Sylvania 3157. The next objective is to remove the dang plastic carpet holder/net clip. Recognize that it is a two part piece. Use a flathead screwdriver for leverage. Pry the cap off by levering the screwdriver in the slot on the holder. Then go behind the carpet and pinch the plastic pin still holding the holder in place. Next,pry off the while plastic pieces from the two bolt/nuts you'll need to remove (see manual). Remove the nuts and give the two screws a push from the inside so you can see how the whole light casing comes off. Pry it off from the outside. On the backside of the bulb holder, turn bulb base counterclockwise and gently remove. Pull bulb upward and replace. Do not touch glass on new bulb with your fingers (wear non-powdered rubber gloves). Make sure the bulb snaps in place. Follow these instructions in reverse. Smile, you just learned something new and saved yourself some easy money.

SOURCE: 2002 Nissan Altima P0720, P1574, P0420

I have a 2002 Nissan Altima. Can anyone tell me what these codes are? And how to fix them? P0420