2000 Volvo S40 Q&A
2000 Volvo S40 Question: Why does car miss and hesitate while accelerating? Check engine light is on.
Need to get the code. Go to different places like Autozone or Oreilly auto,Checker/Kragen auto parts for free code scan. - ebans777
I've seen spark plugs that are non-Volvo, or even Volvo plugs with 20,000+ miles cause misfires. You may also have a bad coil too. Try new Volvo plugs and see if that helps. Try not to drive when the light is flashing, this will damage your catalytic converter $$$. - Bret Bodas