[Robmnrd]

Hey guys, good ol' engine light popped on the other day, had it scanned and it was p0328. Had them clear the code because I didn't notice (at the time) any signs/symptoms so I figured it was either a one-time weird freak thing or maybe the sensor itself acting up. Drove home watching gauges pretty close, and feeling/listening/smelling for anything to be off and didn't notice anything odd other than coolant temp being *slightly* higher than normal (like 198-208 on a drive that would normally never see above 200).


Next day I was doing a moderate throttle pull in 2nd gear leaving work and engine light pops on again and sudden (significant) loss in power/acceleration. Drove straight home, and the whole way there (only like 3 miles) it was definitely running hotter than normal. Not "overheating", but I do that drive (from work) all the time and never ever (even on 110 degree summer days) see temps over ~200 and this time it was basically 202-216 the entire way. When under lighter load and not giving it the beans I didn't notice any sort of decreased performance.


So I'm guessing I actually have an actual problem (based on the running hotter symptom), but was hoping ya'll could chip in some idea(s) of what it may be.


Summarized symptoms:

-p0328
-Running hotter than normal (never overheated per temp readout)
-decreased power/acceleration under higher load, but not so much under light load.


It's going into the dealer on Tuesday, but obviously appreciate any ideas ahead of time.


Car: 2013 ZL1, CAI, LTs w/hi-flow cats, stock everything else, tuned.
67k miles, all mods and tune done at approx. 18k miles with zero problems or lights at any point before now.