David, I remember a 93 at my old place that had the same code. Never could get it to go away. The old feller didn't drive much so it was emissions exempt. We figured the ECM just had a glitch in it for that driver circuit. Anyway. I would just make sure the wire connections are clean and strong. make sure the pins are bent to engage fully. I have my bible to AJ6 engines at work.
On another note, i noticed you car specs. I had the exact car for a bit and sold it to a friend. I think he's looking for a newer one at this point. My car came from Cali and was a base model, no memory, no sunroof. GREAT CAR!! I always thought that car ran smoother than my 97 VDP.
Enjoy that car. And, yes, it will have some issues cause all those cars do but when they are right, there is very little out there that will give you that feeling.
Former Jaguar Master Tech (as of April 2011)
Former Land Rover Tech (Oct 2014)
97 VDP Anthracite (The Keeper)
96 XJ6 BRG/Coffee (sold)
94 XJ6 White base car (sold) 200k and ran PERFECT!
90 XJ6 Sovereign Solent Blue (sold)
94 XJ6 Black (sold)
2010 Wrangler Unlimited (traded)
2013 Wrangler Sahara Unlimited 6spd!!! (yep, wife's)
2004 GMC Sierra 1500 EC/SB 4x4
And so many more that have come and gone....