Question about 2005 Nissan Sentra

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Chek engine light on. Code read thermostat. Could it really be the thermostat.

Check engine light comes on and off. Had the code test done. Comes back as the thermostat. My main concern is that alot of people are saying that with their nissan sentra between year model 2000-2008 the check engine will not go off even though they have almost replaced everything on there car.( as much money they spent could have bought them another car) Is this a defect on nissan???

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  • 68 Answers

Disconnect battery for 15 minutes, and then reconnect. Codes reset, but you will have to reset radio , you have code dont you

Posted on Aug 21, 2017


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6ya staff

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Posted on Jan 02, 2017



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SOURCE: 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.

Posted on Oct 22, 2008

Richard Scordino

  • 6982 Answers

SOURCE: Computer "not ready" for emmissions testing

Your computer will re-set and be "ready" after a certain number of restarts and miles, depending upon how much you use the car it should take from a few days to a week. Surprised the tech didn't tell you that!

Posted on Mar 22, 2009


Phil Lovisek

  • 726 Answers

SOURCE: Nissan Sentra 2001 gxe with code p0420

You will need a new catalytic convertor assembly. Yours is below treshold efficiency in other words its "no good".If you have it replaced, ask the garage/dealer to give you the old one back. Its worth some cash if its full. It doesn't matter thet it failed. They are going after the mesh inside of it and that is worth some $$$$. May not be much , but better than nothing.

Posted on Jul 26, 2009


Wes Manacop

  • 60 Answers

SOURCE: 1997 nissan sentra, scan code reads p0100/ mass or

you may havta replace the air flow meter module.

Posted on Jan 04, 2010

Susan Price

  • 1857 Answers

SOURCE: 98 Nissan Maxima - Check Engine Light, Knock Sensor

If the car is pinging you will set a knock sensor code.'
This comes from bad gas and running lean., You really need this professionally inspected to rule out the basics. I have seen alot of nissans with the knock sensor code stored but the light is still off.
Fill up the tank with high octane chevron and some techron injector cleaner and clear the light. If it stays off for a couple days then go get it inspected. Even if the code is stored it will still pass as long as the light is still off and the monitors have run.

Posted on Jan 04, 2010

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When i drive the car the check eng light comes on then in a bit it will go out I check for code's but there's no code's?

You can only check the code whilst the light is on. Leave the code reader plugged in. When the light comes on, pull over if safe to do so and read the code reader.

I had a similar thing on my Lexus. It was a thermostat sensor that was telling the engine stayed hotter than it should for a while until the thermostat opened.

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When the check engine light comes on this means the management system has found a fault within the system ,
what you have to do is get the codes read ,this you can get done at your local Garage or dealer ,and in some states you can get a free code read out at autozone ,
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