Hi i used a Tool called OBD Doctor 500 to change the mileage on 2019 Ford Transit Custom i read the flash saved the original and then altered the mileage it worked fine i then drove the vehicle for around 10 miles and still fine, i have woken up this morning to 4 XXXX on my dash ? can someone explain what this is ? and also can i just flash my original file back on to correct this problem ? thank you
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