[mubarak]

I have code for thermostats monitoring for almost 6 months now
is it needed to be changed or I wait till throw a cell
no cell now but when I put my scanner it is always there.
car 2008 with 40,000 miles

feedback please

Thank you.

 

[o2sys]

What is the code? Have you tried clearining it to see if it comes back?

 

[mubarak]

2B59 code,,,clearing it and it is coming back next start

Thank you.

 

[o2sys]

So the codes is actively present, what CEL are you waiting for? From the instrument cluster? I don't think it will trigger as does are more emission related lights. Might be wrong =)

Check out this thread:

2B59 thermostat monitoring and cold weather

We're down to freezing temperatures in Minnesota and my car has tripped the 2B59 code. I cleared the code myself once and it came back the next morning. I was about to check codes again, but it actually cleared itself the next day (check engine turned off without intervention from me). I'm...

www.m5board.com

Seems like the thermostat is the stuck/sticking.

 

[mubarak]

I already read this threat
my question is ,,is it fine to use car like this,,it has been 6 months no issues .
only this code 2B59 ,,or is it a must to change thermostat?

Thanks

 

[o2sys]

Yes, if it's stuck open, the engine will not warm up enough and oil will not be able to burn up all the condensation as it will never reach full operating temp.

Vise versa if it's stuck closed, the engine will over heat.

 

[mubarak]

Thank you
My last question
Let say I did not change thermostat and leave it as it is. If only oil heating up slowly..we have warm weather almost all months expect December to March temp between 15-25 C
Other months it is 35-48 C
So if my thermostat stuck close then I have problems,,but now it seems to be stuck open.
Does is it effect the performance of the car?
will it switch to stuck close if I leave it like this or not?

Thank you.

 

[o2sys]

Does your oil temp ever reach 210* F? If it does and the you see no other signs of running rich (colder engines will run richer) I suppose it's ok to drive. Not sure what the real long terms would be.

Ideally, yes, cooler running engines will perform better and last longer (seals and gaskets) but too cool is also bad.

Every situation will be different.

 

[mubarak]

That what I am talking a bout .
In a hot climate in here in summer while driving it is never reach 210F..but if I am stationary then yes it reach 210F and sometime it goes further passing middle dots by little.
I guess I am fine for now.
Definitely will do it in future.
One thing I noticed is fuel consumption is too high ,,is that related to thermostat cos car running richer?

Thank you

 

[o2sys]

Yup, MPG drops as it's not the most efficient temp to burn everything optimally.

And DME is using more fuel to compensate. Running rich also kills your cats in the long run.

 

[mubarak]

Thank you for all clarification my brother .
I will do thermostat soon.

Thank you.