Finally got round to changing the sensor. Took the plug of old sensor (left old sensor in pump) and just plugged it into replacement sensor. All lights went out. Checked pressure reading and it’s 0. Fitted replacement, lost a small amount of fluid but bled with IPNA drove 20miles and all is good.
Should mention that when I removed the old sensor I plugged that in and it still read 292bar and the three lights returned.
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