Well, after almost five years of ownership, the ol' girl decided to misbehave a bit last night...

Pulled the cover off, unhooked the battery tender, and started her up just like I always do, but this time she was running like crap, missing and stumbling...a few seconds later the CEL came on. I shut her down after about 15 seconds, pulled the key out, let it sit for about a minute, then started her up again and she ran fine, albeit with the CEL on. I let it run awhile and it continued to run fine.

Shut it down and pulled codes...

10-PCM
P1431H Fuel Level Sensor 2 Performance
P1516H Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

28-TCS
C1232H LF Wheel Speed Circuit Open or Shorted
C1278H TCS Temporarily Inhibited By PCM

38-RTD
NO COMM

80-RADIO
U1016H Loss of Communications with PCM

99-HVAC
NO COMM

A6-SCM
NO COMM

Such a disparate group of codes makes me think either a bad ground or something inside the PCM itself. I did clean a lot of the common grounds two summers ago (G201, G103, G101, G102, G104, G202), but have not done all of them yet.

If anyone has any experience with a similar situation or ideas on what to chase first, I appreciate any input.

I should clarify, the car seems to be running fine now with no new codes set, so not sure if I can truly find what the issue was...but any advice is welcome.

Thanks!

 

I thought about that after I shut it off...shoulda pulled the codes first. Will do next time...

 

The No Comm codes from the modules inside the car make me think you had a corruption of the serial bus at some point.

Let us know how it goes. I am sure you will.