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Thank you for your question and sorry for the delay in replying to you. My name is Steve and I am a fully qualified vehicle technician wit over thirty years in the trade, hopefully I can help.
The code P0562 indicates low battery voltage and this may be due to a faulty battery or alternator.
The code P0685 indicates Engine control (EC) relay - open circuit. this may just be a faulty relay.
This relay is located in the fascia fuse box/relay plate 2 the actual relay number varies on build, but it should be either 8 or 12 on the attached diagram.
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