[Cooper911SC]

Classic...😕
I know multiple seemingly unrelated faults can also be caused by a weak battery. I see that comment on Jaguar forum frequently.

I too recently experienced some British engineering. Got a call at 4:45pm on a Fri. night from my wife at the office, "car won't accelerate over 5mph. Have to go pick up Hudson (our son) from child care"

With all the rain in SoCal our '05 STR suffered from the water leak down the cowl onto the throttle position sensor. Same type deal, start car, it will idle but you get "park brake fault, DSC not available, limited performance"

Had this happen once 2 years ago when parked on a steep uphill slope. Figured it was random due to extreme angle of car...

Guess not. She called AAA and I headed out with the other car to get our son and meet her.

Crazy heavy rain coming down.

I beat the tow truck driver there. (Was supposed to be there at 5:50pm)
I start car and let it idle 20 minutes. Still no sign of Tow. We wait 20 more min.

I think screw it. Jump in car and drive it around large parking lot. All seems fine! Sensor dried out from idling engine!!

She calls back AAA to cancel tow. It's an automated system, it recognizes her number and provides a new "estimated arrival time for tow"
"Your truck will arrive between 8:50 and 9pm"
Guess they got slammed with accidents and people trying to ford flooded streets...😔

So glad the sensor dried out. We drove the Jag home.

Then I went about "waterproofing" the electrical connector with dielectric grease and dum dum, plus following a Jag TSB and applying gaff tape over several holes in the cowl sheet metal under the plastic covers.

It's amazing to me that these cars were sold widely in far rainier climates than CA... Yet critical sensors aren't waterproof?