How do I manage TPMS alerts?
The TPM warning light turning on suggests that there is low pressure in one or more tires. To address this, check and refill the tires with appropriate pressure settings. A flashing indicator followed by remaining illuminated signifies a failure within the TPMS system itself - request professional help for resolving issues. (Page 37)
From the official MG Mg3 manual, page 37
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