How much is a Diagnostic supposed to cost?

The 'code typically points to the system affected. many codes can have any number of causes , some very simple , others well....not so simple.That $98.00 may save you hundreds in bad guesses and wrong or unnecessary parts. Northern va. emissions program has what they call a 'waiver amount' of $755.00 IF you bring your vehicle to a 'certified emissions repair facility' with your papers from the 'failed' test , they should be able and WILLING to explain the process. If applicable repair attempts are made AND documented (on the DEQ form you were given) , when the dollar amount hits at least 755 and it still does not pass , you may be issued a 'waiver'by the DMV. AGAIN I STRESS proper documentation by a 'CERTIFIED EMISSIONS REPAIR FACILITY' IS A MUST. PLEASE MAKE SURE YOU UNDERSTAND WHAT THEY TELL YOU . deq WEBSITE FOR No. Va. IS 'AIRCHECK VIRGINIA', GOOGLE THAT AND THE FIRST ONE UP ON THE LIST SHOULD GET YOU THE SITE. IT HAS CONSUMER INFO AND FAQs.