Question about 2003 Nissan Altima

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My 2003 altima 2.5sl has the check engine light on....... after new plugs and the front o2 sensor changed it is now reading the cat !!!!!!!! now im also using oil at 1000 miles between oil changes ????????? what do i do ?????? thanks JIM MORGAN

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NEED TO RESET TUNE UP SISTEM

Posted on Mar 28, 2011

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THe engine is burning oil and fouling the sensors and clogging the converter. This could be caused be a faulty PCV valve, bad valve seals or piston rings, This condition only gets worse = as the converter clogs it puts back pressure in to engine and forces motor oil back into the air intake thru either the PCV passage or vent breather tube. You can try to clean some of crud out of the converter and exhaust system with a good additive like Seamist or Techron, etc. The underlying cause will still cause it to clog again is you don't repair the root problem.

Posted on Mar 28, 2011

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1 Answer

Nissan Altima check engine light


How many miles are on the car? If it has higher miles (100k or higher) I would guess the O2 sensor. You will typically see a decrease in fuel mileage. It could also be just the gas cap if it is not screwed on right. I would suggest taking it to an auto part store and they can read the code. If it says it's a problem with the emissions then it is likely the O2 sensor, however, their code reader will not fully diagnose the problem, it will still take some trouble shooting.

Nov 14, 2012 | 2003 Nissan Altima

1 Answer

My 2003 nissan altima is taking long to start.


If the check engine light is NOT on, it will be a mechanical problem like a clogged air filter, fuel filter or faulty spark plugs. If your check engine light IS on, it is a sensor like the O2 or MAF for example. Best to get it diagnosed if the check engine is on to specify with sensor is causing the problem.

Jan 10, 2011 | 2003 Nissan Altima

1 Answer

The engine light stays on, it has an 02 sensor. It may need a new cadillac converter and cv joint.


check engine light on when tested it says bad o2 sensor did you replace 02 sensor it takes driveing it so many miles before light will go off give it couple days you dont need cadillac converter check engine light will go off cv joint they click as you turn dont let a mechanic sell you something you dont need its very rare for cadillac converters to go bad its common for o2 sensors to go bad like yours did but when 02 sensors are replaced it takes driveing it for awhile before it resets itself you also have more then one 02 sensor was then wrong one replaced they screw into your exaust manifold

Dec 13, 2010 | 2003 Nissan Altima

2 Answers

Misfiring


Try fuel injectors.

Jan 15, 2010 | 2003 Nissan Altima

1 Answer

What does dpe 33 means, i got that light on my 2003 nissan altima


Heated oxygen sensor curcuit -
This fault indicates a faulty O2 sensor or bad wire to that sensor.
It is a relatively cheap part - it bolts into the exhaust at the front of the car, you can see it between the engine and radiator, bolted into the exhaust with a cable running to it.
You can check this cable for security and make sure the connector is secure. it probably is faulty though.

Jan 15, 2010 | 2003 Nissan Altima

1 Answer

Nissan altima 2000 2.4l p135 and p325 come up ,


I would start with the o2 sensor first if its not working right it will set off the knock sensor but beware of vaccum leaks sounds like your running lean

Nov 12, 2009 | 2000 Nissan Altima

3 Answers

Have a 2003 Chevy Impala. Check engine light remains on. Scan showed O2 sensor. Could it be a vaccum leak?


Bank 1 is the rear O2 sensor, but experience says to change both. The front one is right behind the engine in the middle of the engine compartment. The rear O2 sensor is on the top of the exhaust pipe, just behind the catalytic converter. But the same code that shows it is the O2 sensor (which is P0420), is the same code for the catalytic converter, or a vacuum leak. Make sure if you do change the catalytic converter, ensure that the new one is OBD-2 compliant. And the vacuum leak could possibly come from the manifold gasket. Let me know what the problem was!

Mar 11, 2009 | 2003 Chevrolet Impala

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