my missus zafiras 'check engine' light came on yesterday, i plugged it in today and the lambda sensor code came up, i took it to work today (and accidently had my bimmer key in my pocket ) the car seems to be running fine and she had no noticable loss in power, just seemed 'normal' i cant afford a new one before christmas, so my question is, will leaving it till the new year hurt her car? what adverse effects will it have?