Pretty much anytime the ck engine light is on, the ECU is running a modified map, whether it's limp home mode or something less severe, so you are right in that a difference in performance is likely.
I have a few tubes of the stuff that comes packaged with the Wabco sensors and I believe it's plain old white lithium.
I don't remember 1317- I'm not out in the shop and I'm packing for vacation-is that rough road signal implausible? After you've reseated the sensors, have you had to reseat them soon after? Like wheel bearing play knocking the sensors just enough to create an air gap fault?
Roverlab is now British 4x4 Specialists.
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Same place, new dogs.