Disco 2 Flashing M and S lights

The battery on my daughters D2 was totally dead someone (possibly me) left an interior light on for over a week. Anyway gave it a jump start and after a bit it fired up only problem is now the M and S lights are flashing on dash tried getting Hawkeye to delete the fault codes P1842 and P1843 but they won’t delete. The disco is stuck in 3rd when I drive it. It now starts ok just the flashing lights on dash. Is it just a matter that the battery isn’t fully charged? Read about xyz switch but had no flashing lights before it got parked.

charge the battery properly for a day or so. then try and delete codes.

The Mad Hat Man said:

charge the battery properly for a day or so. then try and delete codes.

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I'm going get a new battery charger tonight after work and get it charged up. What should the volts read when the engine is running and alternator is charging battery?

It should be above 13.5 VDC.

JUKE179r said:

It should be above 13.5 VDC.

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That’s what I was getting with the Hawkeye 13.5-14.2

But not more than 14.5

TorsionBhudda said:

I'm going get a new battery charger tonight...

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Hi, if the battery is more than 4 years old and it was drained completely down once you can bin it without remorse, better get a new battery to be ruled out rather than a charger or if you want to be 100% certain measure the voltage on it while cranking and if it drops below 10.5V you have the confirmation that it's gone

i recommend this: https://www.tayna.co.uk/car-batteries/bulletbatt/c31-1000/ from own experience with often -20*C winters here