I'm at 120K now (see sig for all that's been done) and about a week ago i started smelling a somewhat "burnt" smell in the exhaust. A couple days later, I got codes:

• P0150
• P0174
• P1164

and pending code:

• P0159

I noticed this morning that while warming up, the exhaust white smoke was more than usual. It's gone once up to normal operating temp. But while warming up, it's a lot more than the usual cold start morning. Plus, as mentioned before, the exhaust smells "funny." If I had to explain it, it smells like burnt plastic or something similar. The idle is slightly rough. I'm guessing it's burning rich, but not sure.

I had the upstream O2's replaced when I first got the truck at, I think, around 87-90K.

-Anthony

 

150, bank 2 sensor 1 malfunction
174 bank 2 running lean, cause 150 code
159, bank 2 sensor 2, slow to respond
can't find the 1164 but it is safe it is similiar to the 174 code.
I would say both bank 2 02's need replacing.

 

Will order both O2's on Amazon (Bosch OE) - will be here on Tuesday. Will replace, reset, and update. In the meantime, she's parked in the lot and will only fetch the kids after school - I'd hate to foul the plugs.

Thanks, Mike!
-Anthony

 

Has the coolant level gone down?
Hopefully you will not get misfire codes soon.

 

No. No coolant loss. The only loss I had was right after a flush, the bleeder screw started leaking so I replaced it. But no coolant loss, no sweet smell in the exhaust, and no prolonged white smoke (other than before it warms up.)

'Got the O2's today and will replace, reset, and then see if the codes come back or not.

-Anthony