I just bought a used 2000 c70 with 90K miles. It had a check engine light. Orginal owner said the new timing belt was installed 1 tooth off and is throwing the code, and it is to much trouble to correct..and... it wont hurt anything. I confirmed the code is a timing issue. Car runs / drives fine. Mileage is excellent.

Should I worry about it??

 

Never use old belt install new one. Always change water pump while apart if you can not confirm it has been replaced!

 

Morning - belt and pump are new (have receipts) previous owner had a friend help him and they are 1 tooth off. Is this a big issue other than the thrown code on?>

 

I would confirm the "one tooth off" by checking the timing. This is a ZERO interference engine, therefor it is CRITICAL the timing is correct. Valve/head job can run $3000 if interference happens! Hi revs can do it!