2006 STS V8 1SF RWD
I've noticed over the last 2 weeks that I've been getting really terrible gas mileage in my '95 STS, and I'm talking bad, like a little over 200 miles on a full tank! I ran the diagnostics and it spit out P056 as the only current code and that's the trans. speed sensor, which in my mind would have nothing to do with gas mileage. I think it may be my catalytic converter though, my car bogs down at dead stop acceleration, and stutters a bit during hard accel at any speed, it also emits that stinky exhaust smell when she's givin "the nuts"....could this be my problem, or could it be something else? Any input would be greatly appreciated because it's getting to be kind of expensive to drive my car and I love driving this thing so I have to get this fixed and soon.....