Rep Power: 0

Recently replaced Spark Plugs & Ignition Coils, after changing Valve Gasket. While changing ignition coils, I saw smoke coming out of the O2 Sensor for a brief period & (im sure) since then I hear a rattle noise from under the hood. Today in the morning, after the started my car... The CEL flashed twice... After again some 15 mins later, when I stopped for gas fill up & started the engine... CEL flashed 4 times.


Do you think, changing O2 Sensor helps ?

Does the below work ?
http://shop.advanceautoparts.com/p/b...465%7CL3*16466

Thanks again.. in advance...

 
Rep Power: 518

What code(s) does it have stored?

Oh HELL NO!


Putting a crappy Bosch sensor is like installing brand new EXTRA problems to pull your hair out with.

Use the same brand and type that was installed by the factory.

And figure out what's actually wrong before throwing parts at it.

 
Rep Power: 0

The CEL doesn't stay up all the time... it just flashed few times & is off now... Any other way to check the same ?

 
Rep Power: 308

The codes may be stored, and could be read.

 
Rep Power: 0

effects of being tired from a vacation & half asleep...

it wasn't a CEL that flashed... "Maint Required" LEd it was !!!

it flashes for 3-4 times soon after I start the car & goes away...

The rattle sound (not very loud), is on though...

Any suggestions ?

 
Rep Power: 308

OEM ?? 3rd Party ??

 
Rep Power: 0

3rd Party

 
Rep Power: 0

Oil Change is about ~500 miles old (after the valve gasket change).

The Valve Gasket change, might leave some trash in the engine... You think, this is causing the issue ?

 
Rep Power: 518

So reset that light and change the oil?


How would someone like Stevie Wonder locate the source of a noise?

 
Rep Power: 0

Curious to know... My car is at 150K right now & i have no idea if the O2 sensor was ever replaced... What is the milage we do that ? Is it a good move to do it now ?

 
Rep Power: 518

IMO there is no specific mileage interval and there is none listed in your owners manuals.
We don't ever just replace them "for maintenance" these days.




I don't change one unless it causes a code, it's verifiably electrically bad, causing a driveability problem, or physically damaged.....maybe a couple other possible reasons...

Some of the sensors are awful damn pricey to just be changing *****-nilly.
Unless someone just has way too much money laying around and needs to spend it.

 
Rep Power: 0

The least you could do would be to pull it out and clean the sensor itself:

http://seafoamsales.com/clean-oxygen...with-sea-foam/

 
Rep Power: 518

^ I wouldn't do that to one that is working....