Elm327 plug in module is a good cheap diagnostic tool which can run on pc or phone.very cheap on ebay
Steve
September 2013
They are usually ok for getting/deleting fault codes,you get what you pay for,you may find it won`t access some motors but be fine with others,some laptops/readers are thousands of pounds,hence a charge for getting plugged in at a garage.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.