Ford Focus: UK ST170 Engine warning light help!

Had this before..

knocked the bottom of my focus on some raise bit on way to work.
engine warning light came on. took it to for.. it was a sensor in the
exhaust that had taken the impact. he said its nothing major but a new
sensor..£250. ok.. same bit of road done it again.. should forward my
bills to the councill. already done 4 tyres in the past year due to
pot holes. anyway

is there anything i can do rather rather than taking to a garage.. my
old man is a ’old school’ mechanic and im more electrical..

any advice would be great

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"mordzy" <com> wrote in message
news:com... 

Why not go aftermarket and do it yourself? The part should be a lot cheaper
anywhere but the dealership.

John Cairns