Question about 2005 Nissan Altima

1 Answer

SERVICE ENGINE LIGHT IS ON. HAVE RESET. GETTING A CODE THAT THE CATALYIC CONVERTER NEEDS REPLACED. ONLY HAVE 87,00 MILES ON CAR. IS THIS THE ONLY CAUSE FOR THIS CODE?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Nissan Master
  • 17,970 Answers

To RESET the Check Engine light, try this procedure, disconnecting the battery might reset the check engine light on some cars. However, instead of doing so, I'd recommend to bring your car to a dealer or a mechanic for proper diagnostic, and here is why:
- not all cars will clear the code after disconnecting the battery
- often, the problem may be actually covered by the warranty and repaired free of charge by your dealer. For example, if you have the code P0420 - Catalyst System Efficiency Below Threshold it's very possible that your catalytic converter is still covered by the original emission warranty and might be replaced free of charge (would cost you close to $1000 otherwise).
- some problems, if not repaired in time may cause a serious damage and more costly repair.
- the Readiness code will be erased, which may prevent your car from completing an emissions test. (Readiness code is an indication that certain emission control components of your car have been self-tested)
- the radio, if code-protected, may be locked after disconnecting the battery
- the "check engine" light will come back anyway if the problem still exist.

The code itself doesn't tell exactly what component is defective - it only indicates where ... detected that your engine is misfiring, which could damage your catalytic converter.

When the engine is warmed up and running normally the upstream oxygen sensor reading fluctuates and the downstream one is fairly steady. In the case where both readings are fairly steady, a P0420 check engine light code is set.

Possible Causes:
- Oxygen (O2) sensor not working correctly
- Damaged or leaking exhuast (pipe, manifold, catalytic converter)
- Damaged catalytic converter

Diagnostic Help:
To diagnose a P0420 trouble code we begin by checking for exhaust leaks under the vehicle. Then use an oscilliscope to check the waveforms of both upstream and downstream O2 sensors. The front reading should vary, the rear should be steady. Replace as necessary. Check the rear Heated O2 Sensor. Check the catalytic converter, replace if necessary. If necessary, check for wiring and component concerns.


Hope this helps; keep us updated.

Posted on Jan 03, 2011

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Hi, I have a 98 Honda Accord Ex V6 that showed the P0420 code and I was told that the catalytic converter needs to be replaced. So I replaced it and the check engine light came on with the P0401 code. I...


The error code p0420 does not rise only due to faulty catalytic converter but may also rise due to one of following reason:

1. Faulty rear O2 sensor

2. Damaged O2 sensor wiring

3. Exhaust leak

The error code p0401 indicates faulty Engine Gas Recirculation (EGR) valve. The remedy to the problem is:

a. Replace EGR valve

b. Repair damaged wiring of EGR valve

c. Clean the EGR valve tubing

Jun 27, 2013 | Cars & Trucks

1 Answer

My SERVICE ENGINE SOON light came onAGAIN!


Disconnecting the battery should reset it but I would bet that the light will come back on. I would have a auto parts store read the error code for you. They can also reset it. There are two o2 sensors on this car one on the manifold and one down stream from the converter. If you are getting an o2 error code it could also be the converter.

Apr 14, 2013 | 1996 Saturn SL

3 Answers

Trouble light comes on.


most likley the people who serviced it never reset the service clock up,, so the car dont know its just had a service,, and still "thinks "it needs one soon, just get the service clock reset

Feb 21, 2010 | 2000 Chevrolet S-10

2 Answers

I have a 1997 Honda Accord SE 4 Cylinder with a check engine light on. I had a mechanic run a diagnostic and it came back with code p0740, torque converter clutch circuit malfunction. What does this mean?


The torque converter is a key functional part of the automatic transmission. The car computer detected a malfunction and set the P0704 code. Most likely you have over 100k miles already so it could be problems with the transmission. Most mechanics will reset the light and code if you are not having any transmission problems. It the problem comes back you will need to service or replace the transmission. Best thing to do is to take the car to a mechanic you trust and find the best and cheapest way to address the malfunction.

Dec 31, 2009 | 1998 Honda Accord

2 Answers

How to get the service engine soon light off


disconnect the battery negative cable for 5 minutes, this will reset it.

Dec 14, 2009 | 1997 Ford Thunderbird LX

1 Answer

Computor will not reset after emission repair work


unhook the battery for about ten minutes... hook it back up... if the light still comes on.... go to your local autozone and have them scan it for the code(s) (free). incidentally if the light comes back on .... they didn't likely fix your problem. also if that stereo is of the anti-theft variety... make sure you know the code and how to enter it.

Apr 02, 2009 | 2003 Cadillac Deville

1 Answer

Service engine soon-2003 mitsubishi galant, 87000 miles


it might be the a couple of thngs...

1)catalytic converter messed up
2)oxygen sensor before or after the catalytic converter needs to be replaced.
3)belts need tightening
4)your fuel cap has not been well tightened.

go down to a mechanic and have them check your engine light. They most likely will have a computer to check and narrow down what might be the problem.

Mar 16, 2009 | 2003 Mitsubishi Galant

3 Answers

2003 Nissan Altima 2.5S, Check Engine Light Problem.


this problem could be caused by the mass air flow censor, i had the same problem with my car. it is really pricey at the dealer so you might want to check elsewhere for this part. I found one at a scrap yard for 85% less that the dealer and i also got life time warranty, the dealer does not offer any warranty on this part.

Oct 22, 2008 | 2003 Nissan Altima

1 Answer

False check engine reading - or not


have you checked the O2 sensors there are two and they start to go bad around 100000 miles

Jul 23, 2008 | 2001 Buick Regal

Not finding what you are looking for?
2005 Nissan Altima Logo

Related Topics:

188 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts

yadayada
yadayada

Level 3 Expert

76682 Answers

Phil Lovisek
Phil Lovisek

Level 3 Expert

726 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Are you a Nissan Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...